How to prepare them for microscopical mounting
Beauty of diatom frustules — Utilisation of ditto in the arts
Various species of diatoms, Isthmia Pinnularia, Pleuro-
sigma, Navicula, Stauroneis, Cocconeis, &c. Stalked
diatoms, as Licomophora — Structure of latter — The Amœbas
- Fresh-water sponges Structure of ditto - Hydras -
Their habits and development · Rotifers - Sessile rotifers
- Melicerta and Stephanoceros — Their habits and structure
Infusoria Vorticella, Epistylis, &c. — Rotifer vulgaris
Habits of ditto Fresh-water polyzoa Lophopus
crystallina, Plumatella repens, &c. — Cyclops, its habits
and development — Water fleas — Relation of animalcules
to each other
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Difficulties attending private marine aquaria — Construction of
ditto - Rockwork for ditto - Polygonal marine table tanks
Sea-weeds for ditto Sea-lettuce (Ulva) — Cladophora —
Oxygen-yielding qualities of certain sea-weeds Calli-
thamnion Green and red sea-weeds - Delesseria and
Plocamium-Cladophora, Bryopsis, Griffithsia, Ceramium,
Rhodymenia, Padina, Corallina officinalis, &c. - Small
wrack "Irish moss Fructification of sea-weeds — Zoo-
spores of ditto Their use as food for lowly organised
animals - Best time for introducing sea-weeds into aquaria
— Spontaneous appearance of sea-weeds in tanks of public
aquaria Oxygenation of sea water-
Artificial oxygen-
Marine scavengers, as Haliotis, Patella, &c. - Mr. W. R.
Hughes on construction of marine tanks Dark-chambered
slope-backed tanks Aeration of tanks - Contrivances for
ditto — Regulation of light and temperature of ditto —
Evaporation of water - Artificial sea-salts, their chemical
composition — Mr. Gosse on ditto Specific gravity balls