Annals & Magazine of Natural HistoryTaylor & Francis, Limited, 1855 |
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Page 26
... ; 7 , liver ; the gill- tubes are distended with spawn . fices , the interspaces with two rows of cirri ; branchial opening with a fringed border , the others plain . Anterior. 26 On the Animals of certain Genera of Conchifera .
... ; 7 , liver ; the gill- tubes are distended with spawn . fices , the interspaces with two rows of cirri ; branchial opening with a fringed border , the others plain . Anterior. 26 On the Animals of certain Genera of Conchifera .
Page 31
... rows . Post - occipital segment not larger than the rest ; furnished with two tentacular cirri on each side , of which the upper is about twice as long as the lower , equalling respectively the an- tenn¿ . Those of the two following ...
... rows . Post - occipital segment not larger than the rest ; furnished with two tentacular cirri on each side , of which the upper is about twice as long as the lower , equalling respectively the an- tenn¿ . Those of the two following ...
Page 34
... row of short pinn¿ : bristles with an oval expansion at their base . Description . - Gill - fans two , ample , each ... rows , and others in an intermediate condition , the pinn¿ being rudimentary or short ( fig . 26 ) . The stems ( fig ...
... row of short pinn¿ : bristles with an oval expansion at their base . Description . - Gill - fans two , ample , each ... rows , and others in an intermediate condition , the pinn¿ being rudimentary or short ( fig . 26 ) . The stems ( fig ...
Page 89
... rows , is rounded , prominent , projecting over the dorsal edge , and passes , by a narrow and sometimes constricted neck , into the convex body of the valve with which the front and hind lobes are continuous . The middle lobe , though ...
... rows , is rounded , prominent , projecting over the dorsal edge , and passes , by a narrow and sometimes constricted neck , into the convex body of the valve with which the front and hind lobes are continuous . The middle lobe , though ...
Page 90
... row and sometimes obscured on the ventral border by the con- vexity of that part of the valve . This occurs in three of the limestones , and from its small size and general appearance is liable to be confounded with the numerous Cythere ...
... row and sometimes obscured on the ventral border by the con- vexity of that part of the valve . This occurs in three of the limestones , and from its small size and general appearance is liable to be confounded with the numerous Cythere ...
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Common terms and phrases
abdomen Allemão animal antenna appears axis B. H. Hodgson Beng Beyrichia bill black bird Blyth body branches branchi¿ branchial Bright A.M. bristles British brown carapace carpels cavity centre characters Chiton cilia cilium Cloudy A.M. colour convex Crustacea described distinct dorsal eggs embryo Entomostraca external extremity feathers ferruginous furrow genera genus gills glands gonidia gonidial cell Gray green disks Hemipedina Hist Hodgs Hodgson inch individual internode larva larv¿ latter layer leaves length lenticels lines lobes lower margin membrane Mollusca mollusk mucus-layer Museum nearly Nepal observations operculum organs Orthotomus pair pale pedicel peristome plants portion posterior present rain A.M. Reeve remarkable resemblance ridge rounded rows Sandwick segments shell side Silurian species specimens stamens stem stri¿ structure surface tail terminal Testâ tion transverse tubercles upper vegetable ventral vesicle wing Zool
Popular passages
Page 256 - Müsset im Naturbetrachten Immer eins wie alles achten; Nichts ist drinnen, nichts ist draußen: Denn was innen das ist außen. So ergreifet ohne Säumnis Heilig öffentlich Geheimnis. Freuet euch des wahren Scheins, Euch des ernsten Spieles: Kein Lebendiges ist ein Eins, Immer ist's ein Vieles.
Page 196 - Every species has come into existence coincident both in time and space with a preexisting closely allied species," Connects together and renders intelligible a vast number of independent and hitherto unexplained facts.
Page 187 - ... complicated branching of the lines of affinity, as intricate as the twigs of a gnarled oak or the vascular system of the human body. Again, if we consider that we have only fragments of this vast system, the stem and main branches being represented by extinct species of which we have no knowledge, while a vast mass of limbs and boughs and minute twigs and scattered leaves is what we have to place in order, and determine the true position each originally occupied with regard to the others, the...
Page 188 - ... connected with the continent than they are at present. They must have been first peopled, like other newly-formed islands, by the action of winds and currents, and at a period sufficiently remote to have had the original species die out, and the modified prototypes only remain. In the same way we can account for the separate islands having each their peculiar species, either on the supposition that the same original emigration peopled the whole of the islands with the same species from which...
Page 189 - Hitherto no attempt has been made to explain these singular phenomena, or to show how they have arisen. Why are the genera of Palms and of Orchids in almost every case confined to one hemisphere? Why are the closely allied species of brown-backed Trogons all found in the East, and the green-backed in the West?
Page 188 - Such phenomena as are exhibited by the Galapagos Islands, which contain little groups of plants and animals peculiar to themselves, but most nearly allied to those of South America, have not hitherto received any, even a conjectural explanation. The Galapagos are a volcanic group of high antiquity, and have probably never been more closely connected with the continent than they are at present.
Page 208 - Rhizopods, by the entanglement and drawing in of minute vegetable particles, through the instrumentality of the pseudopodia ; and that the addition of new zones probably takes place by the extension of the sarcode through the marginal pores, so as to form a complete annulus, thickened at intervals into segments, and narrowed between these into connecting stolons, the shell being probably produced by the calcification of their outer portions. And this view he supports by the results of the examination...
Page 190 - The law here enunciated not merely explains, but necessitates the facts we see to exist, while the vast and long-continued geological changes of the earth readily account for the exceptions and apparent discrepancies that here and there occur. The writer's object in putting forward his views in the present imperfect manner is to submit them to the test of other minds, and to be made aware of all the facts supposed to be inconsistent with them. As his hypothesis is one which claims acceptance solely...
Page 207 - ... classification of which there is consequently no safe basis, the author has undertaken a careful study of some of its chief typical forms, in order to elucidate (so far as may be possible) their history as living beings, and to determine the value of the characters which they present to the systematist. In the present memoir, he details the structure of one of the lowest of these types, Orbitolites, with great minuteness ; his object having been, not merely to present the results of his investigations,...
Page 184 - That during an immense, but unknown period, the surface of the earth has undergone successive changes ; land has sunk beneath the ocean, while fresh land has risen up from it; mountain chains have been elevated; islands have been formed into continents, and continents submerged till they have become islands; and these changes have taken place, not once merely, but perhaps hundreds, perhaps thousands of times...