. Goldfish breeds and other aquarium fishes, their care and propagation; a guide to freshwater and marine aquaria, their fauna, flora and management. Aquariums; Goldfish. FOOD AND FEEDING. FIG. 67. Polyphemus pedeculus. Greatly enlarged. caying vegetation, organic ofFal and small infusoria. They are the best food for the goldfish. It has been noticed that the tiny newly hatched alevin will follow Daphnia to feed upon the young as they are released from the brood pouch of the female. The most generally distributed forms are Daphnia l^evis, D. pellucida, D. pulex, Daphnella branchyura, Ceriodaph
. Goldfish breeds and other aquarium fishes, their care and propagation; a guide to freshwater and marine aquaria, their fauna, flora and management. Aquariums; Goldfish. FOOD AND FEEDING. FIG. 67. Polyphemus pedeculus. Greatly enlarged. caying vegetation, organic ofFal and small infusoria. They are the best food for the goldfish. It has been noticed that the tiny newly hatched alevin will follow Daphnia to feed upon the young as they are released from the brood pouch of the female. The most generally distributed forms are Daphnia l^evis, D. pellucida, D. pulex, Daphnella branchyura, Ceriodaphnia pulchella and Sida crystallina. Polyphemus. Fig. 67. One species of Polyphemus is quite gener- ally present in still and stagnant water. This is P. pedeculus, of which the body is of most grotesque form, owing to the peculiar humplike brood pouch. It is smaller than the Daphnia, about .65 to i millimeter in length. Leptodora. Fig. 68. One form of Leptodora is quite generally present in larger bodies of freshwater, and may be taken on the surface on bright days. The body is long and is covered by a faintly segmented carapace. There are two long swimming legs and the very long antennae branch at the ends and are furnished with swimming bristles. L. hyalina is the most generally dis- tributed form. Its length is about I to millimeters. Sub-Order Ostracoda. Com- pressed body small, indistinctly seg- FIG. 68. Leptodora hyalina. Greatly enlarged. mentcd, in a bivalvC shcll, fivC pairS of feet adopted to swimming and creeping. The freshwater form is Cypris. CypRis. Fig. 69. Several species are very generally distributed and may be taken from almost every water which contains the other entomos- traca. The body is unsegmented and is enclosed in a carapace articulated at the dorsal edge to form a bivalve shell. At the anterior end is a median eye, and there are seven pairs of swimming appendages. Its size is I to millimeters, and its movements are slow and leisurely either In
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectaquariu, bookyear1908
