. Goldfish breeds and other aquarium fishes, their care and propagation : a guide to freshwater and marine aquaria, their fauna, flora and management. With 280 explanatory illustrations, printed with the text. The mouth is on the undersurface and is provided with one pair ofmandables, two pairs of maxillae, and threepairs of maxillipeds or foot-jaws. Thesegments of the thorax under the carapacebear a pair of prehensile limbs with chelaeor claws, two pairs of ambulatory or walk-ing legs with smaller claws and two pairsof legs ending in simple pointed extrem-ities. These, together with the swim-
. Goldfish breeds and other aquarium fishes, their care and propagation : a guide to freshwater and marine aquaria, their fauna, flora and management. With 280 explanatory illustrations, printed with the text. The mouth is on the undersurface and is provided with one pair ofmandables, two pairs of maxillae, and threepairs of maxillipeds or foot-jaws. Thesegments of the thorax under the carapacebear a pair of prehensile limbs with chelaeor claws, two pairs of ambulatory or walk-ing legs with smaller claws and two pairsof legs ending in simple pointed extrem-ities. These, together with the swim-merets and telson, constitute twenty pairsof appendages. Most localities have sev-eral species, difficult of identification, asthey all exhibit considerable distribution ot the 79 species ofCatnbarus is limited to the Atlantic water shed and of the 7 speciesot Astacus to the Pacific water shed. The species most abundantfrom New York to Alabama and south to Virginia are Cambarus blandiniiyFig. 73, C. propinquus and C. affinis; but the greatest number of formsoccur in the southern and central portion of the United hide under stones or in holes excavated in the banks, where. FIG. 73. Firshwater Crayfish,Cambarus blaniiinii. I23 FOOD AND FEEDING FIG. 74. Rotifera. 1. Bratichionus rubens. 2. Rattulus longiseta. 3. Diurella tigris. they sit with the head toward the opening and the claws ready to grasp anysmaller creature or dead animal matter. They should not be introducedinto the aquarium with fishes but kept bv themselves and when acclima-tized can be fed on small particles of meat or the flesh of mussels or oysters. Rotifera. The Trochelminths, of which the wheel-animalcules formone group, consist of Rotifera andGastrotricha, generally fresh water forms,and Dinophilea of salt and blackish waters. About 25 species of Rotiferaoccur abundantly in the United States in almost all bodies of are of small size inclosed in a cuticle to form a
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectaquariu, bookyear1908
