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DEFINITIONS OF SYSTEMATIC NAMES. 



Cistudo, genus of chelonia; box turtles. 

 Cladoselache, genus of extinct sharks. 

 Clupeidae, family of fishes including herring, 



shad, ale wives and menhaden. 

 Cobitis, genus of fishes; loaches. 

 Coregonus, genus of fresh- water fishes; 



white fish. 

 Crocodilia, order of reptiles including the 



alligator. 



Crotalus, genus of snakes, rattlesnakes. 

 Cryptobranchus, genus of tailed amphibians 



with permanent gill slits; hellbender of 



No. America. 

 Cyclostomes; class of vertebrates without 



jaws, including lampreys and hag fishes. 

 Cynognathus, genus of extinct theromorph 



reptiles. 

 Cyprinids, family of freshwater fishes, 



carp, minnows. 



Delphinus, genus of whales; dolphins. 



Derotremes, tailed amphibia with perma- 

 nent gill slits. 



Desmognathus, genus of salamanders. 



Didelphys, genus of marsupials, opossums. 



Diemyctylus, genus of small spotted sala- 

 manders. 



Dinosaurs, extinct terrestrial reptiles, some 

 of enormous size. 



Dipnoi, sub-class of fishes with gills and 

 lungs, lung-fishes. 



Discosaurus, genus of stegocephalous 

 amphibians. 



Dromatherium, genus of extinct, primitive 

 mammals. 



Echidna, genus of monotremes, spiny ant- 

 eaters of Australia. 



Edentates, order of mammals including 

 sloths, armadillos, etc. 



Elasmobranchs, a sub-class of vertebrates 

 including the sharks and skates. 



Embiotocids, family of fishes from the 

 Pacific which bear living young; surf 

 perches. 



Epicrium, genus of caecilians. 



Erinaceus, genus of insectivorous mammals; 

 hedgehogs. 



Erythrinus, genus of tropical fishes. 



Euornithes, a name given to all recent birds. 



Eupomatus, fresh-water sunfish. 



Eurycormus, genus of fossil ganoid fishes. 



Firmisternia, anurous amphibia with the 

 halves of the sternum united to each 

 other; frogs. 



Fulica, genus of water bird; coots. 



Galeocerdo, genus of selachians; tiger 



sharks. 

 Galeopithecus, a flying mammal from Asia 



of uncertain position. 

 Galeus, genus of sharks; dogfish. 



Gallus, genus of birds including the com- 

 mon fowl. 



Gambusia, genus of fishes; top-minnow. 



Ganoids, subclass of fishes intermediate 

 between sharks and bony fishes; stur- 

 geon, garpike, etc. 



Geococcyx, a genus of cuckoos. 



Geotrition, a genus of European salaman- 

 ders. 



Gerrhonotus, genus of lizards. 



Glyptodon, genus of edentates allied to 

 armadillos. 



Gnathostomes, vertebrates, which have jaws; 

 includes all except cyclostomes. 



Gobiids, family of small fishes, mostly 

 marine; gobies. 



Gymnophiona, order of amphibia without 

 tail or legs; tropical; caecilians. 



Gymnotus, electric eel of So. America. 



Halmaturus, genus of kangaroos. 

 Hatteria, another name for Sphenodon. 

 Heloderma, poisonous lizard from Arizona; 



Gila monster. * 

 Heptanchus, primitive shark with seven 



gill slits. 

 Hexanchus, primitive shark with six gill 



slits. 

 Holocephali, order of shark-like fishes; 



Chimaera. 



Hypogeophis, genus of Caecilians. 

 Hyracoidea, order of mammals including 



Hyrax. 



Ichthyophis, genus of caecilians from Ceylon. 

 Ichthyopsida, group of vertebrates which 



have gills; fishes, amphibia. 

 Ichthyosaurs, extinct aquatic reptiles. 

 Iguana, genus of tropical American lizards. 

 Insectivores, order of small mammals; 



moles, shrews, etc. 

 Inuus, genus of macaques including the 



Barbary ape. 



Lacerta, genus including the common 

 lizards of Europe. 



Lacertilia, sub-order of reptiles including 

 all lizards. 



Lagenorhynchus, a genus of dolphins. 



Lepidosiren, genus of lung fishes (dipnoi) 

 from South America. 



Lepidosteus, genus of ganoid fishes, gar- 

 pike. 



Lopholatilus, genus of teleosts from Gulf 

 Stream; tile fish. 



Macropus, genus of marsupials; kangaroos. 

 Mammals, class of vertebrates, with hair, 



nourishing the young with milk. 

 Manatus, genus of sirenians, manatees. 

 Manis, genus of old-world edentates; scaly 



ant-eaters. 



