Journal of Morphology, 32. köideGinn & Company, 1919 |
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Common terms and phrases
aboral adult ala nasalis albumen Amia aorta appear basis cranii bilaminar blastocysts blastocyst blastomeres bone Bouin canal cartilage cavum cerebrale cranii cement body chromosomes cleavage cranii Dasyurus diameter embryonic area embryos entoderm entoderm mother cells entodermal cells EXPLANATION OF FIGURES external facialis female fenestra fishes fold foramen formed furrow germ cells gland gonads Hill's fluid hind end Hofbauer Hofbauer cells Hyodon hypophysis instar internal carotid arteries jugularis labial lateral edge lies litter median mesial mitosis muscle myodome nasal apertures naso-buccal groove nervus normal notochord nuclei opossum opossum egg oral end outer ovary ovum parachordal parasphenoid Plagiostomi plate polar polar body portion posterior posteriorly recti externi secondary upper lip section total shell membrane shown side specimens sperm mass spermatocyte spermatogonia spermatophore stage supramaxillary surface Teleostei testis Thelia tissue trabeculae trophoblastic trophoblastic area tunic unfertilized uterus ventral ventral compartment vesicle wall yolk
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Page 704 - ... Spencer Microscopes Nos. 44 and 64 Are now supplied with our NEW 4 Millimeter OBJECTIVE made from a new formula from optical glass made in our own factory. This objective not only gives superb definition but has a Long Working Distance nearly twice that of the old objectives of equal magnification. Now that we are released from war work, we are again in position to give to our customers the prompt and efficient service which has characterized our business in former days. Spencer Lens Company...
Page 187 - TW 1898 On the morphology of the skull in the Paraguayan Lepidosiren and in other Dipnoids.
Page 299 - ... certain fishes, in part of axial origin, and not simply a dermal bone that has gradually sunk inward to its actual position. In the Siluridae (Ameiurus) there is apparently a much reduced, but nonfunctional, dorsal myodomic compartment, but no ventral compartment; that portion of the parasphenoid that lies in the prootic region being developed in what corresponds to the horizontal myodomic membrane of others of the Teleostei. In Amia the myodome corresponds to the dorsal compartment only of the...
Page 701 - Apparatus, Range Finders and Gun Sights for Army and Navy, Searchlight Reflectors, Stereo-Prism Binoculars, Magnifiers and Other High-Grade Optical Products.
Page 304 - ... posterior prolongation of the trabecula that is formed by the polar cartilage, but in Ameiurus it enters the cranial cavity through the foramen opticum, and hence would seem there to pass lateral and then dorsal to the trabecula. In embryos of the Mammalia ditremata also this artery is said to pass upward lateral to the trabecula, but it is probable that it here simply passes lateral to the infrapolar process of the polar cartilage, the latter cartilage itself not fusing directly with the parachordal...
Page 305 - JS 1902 On the structure of the larval Polypterus. Trans. Zool. Soc., vol. 16.
Page 299 - ... whenever the horizontal myodomic membrane undergoes ossification, the bone so formed forms part of the parasphenoid. This bone is thus certainly, in certain fishes, in part of axial origin, and not simply a dermal bone that has gradually sunk inward to its actual position. In the Siluridae (Ameiurus) there is apparently a much reduced, but nonfunctional, dorsal myodomic compartment, but no ventral compartment, that portion of the parasphenoid that lies in the prootic region being developed in...
Page 171 - ... portion of the upper lip, and are not enclosed by the maxillary portion of that lip. They are not even placed between the upper and the lower lips, inasmuch as the vaulted flap, on the underside of which they lie, is not the upper lip, but the anterior part of the head.
Page 306 - On the Cranial Osteology of the Fishes of the Families Mormyridae, Notopteridae, and Hyodontidae.
Page 488 - Nov. 24th. 1918 The results of thyroid removal in the larvae of Rana pipiens.