. Goldfish varieties and tropical aquarium fishes; a complete guide to aquaria and related subjects. Aquariums; Goldfish. TKOPICAL AQUARIUM FISHES 141 swim through the water by means of circlets of hairs or ciUa arising from the front of their heads, by the vibratile action of which they swim and disport themselves through the water. In fact, rotifers derive their name from the wheel-like appearance produced by the motion of the circlets of cilia while feeding and swimming. For culture water to have practical food value a single drop should contain at least half a dozen living objects that can
. Goldfish varieties and tropical aquarium fishes; a complete guide to aquaria and related subjects. Aquariums; Goldfish. TKOPICAL AQUARIUM FISHES 141 swim through the water by means of circlets of hairs or ciUa arising from the front of their heads, by the vibratile action of which they swim and disport themselves through the water. In fact, rotifers derive their name from the wheel-like appearance produced by the motion of the circlets of cilia while feeding and swimming. For culture water to have practical food value a single drop should contain at least half a dozen living objects that can be seen in the manner suggested. Water rich in life will show rotifers so thickly that they almost touch one another—probably two hundred in a small drop. In taking water from the culture tank to feed the fish it should be skimmed from the surface,. Fig. 96. Common Forms of Microscopic Anim.\l Life in Freshw.\ter (Greatly magnified) 1. LoxODES, a very common form. 2. Ceratium, a very common form, especially in ponds and lakes. 3. Par.\maecium, a very common form, the slipper animalcule. 4. BuRSARiA, a very common form, one of the largest. 5. Stylonycha, a very common form, found everywhere. 6. Phacus, not so common as the above numbers. 7. Spirostomum, common everywhere. 8. Euglena, common everywhere. 9. Chilodon, common everywhere. 10. Trachelocerca, common everywhere, the swan animalcule. 11. EupoLOTES, not an aquarium in America without examples. 12. Didinium, predacous, feeds on paramaecium and others. 13. Trachelocerca, small but plentiful. 14. CoLEPS, the barrel animalcule, Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Innes, William T. (William Thornton), 1874-1969. Philadelphia, Innes
Size: 1928px × 1297px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorinneswilliamtwilliamt, bookcentury1900, bookdecade1910
