DEFINITIONS OF SYSTEMATIC NAMES. 



Acanthias, genus of sharks including com- 

 mon dogfish. 



Acipenser, genus of ganoids; sturgeon. 



Aglossa, tongueless toads from Africa and 

 South America. 



Allantoidea, the higher vertebrates with 

 allantois; reptiles, birds and mammals. 



Amblystoma, genus of tailed amphibians, 

 largely American. 



Amia, genus of ganoid fishes peculiar to 

 America. 



Ammoccetes, the larval stage of the lam- 

 preys. 



Amniotes, division of vertebrates with 

 amnion and allantois in development; 

 reptiles, birds and mammal. 



Amphibia, class of vertebrates, young with 

 gills, adults with lungs; frogs, toads and 

 salamanders. 



Amphioxus, fish-like form without verte- 

 brae, type of group of Leptocardii. 



Amphipnous, eel-like fishes from India. 



Amphisbaenans, legless lizards. 



Amphiuma, genus of tailed amphibians 

 with rudimentary legs and gill slits; 

 southern U. S. 



Anallantoidea, vertebrates without an 

 allantois; ichthyopsida. 



Anamnia, vertebrates without an amnion; 

 ichthyopsida. 



Anguis, genus of footless lizards. 



Anser, genus of birds including geese. 



Anthropoids; sub order of primates includ- 

 ing the higher apes and man. 



Anura, order containing the tailless amphib- 

 ians; frogs and toads. 



Aquila, genus of birds including eagles. 



Archaeopteryx, a fossil bird with teeth and 

 a reptilian tail 



Archegosaurus, genus of extinct stego- 

 cephal amphibians 



Arcifera, group including toads and tree 

 toads. 



Arthrodira, order of extinct dipnoi (lung- 

 fishes) some very large. 



Artiodactyla, ungulate mammals with even 

 number of toes; cattle, sheep, deer. 



Astroscopus, genus of electric fishes; 

 marine. 



Atelodus, genus of two-toed rhinoceros. 



Aves, the class of birds. 



Bdellostoma, genus of myxinoids; hag 

 fishes of the Pacific. 



381 



B clone, genus of fishes; bony gars. 

 Bombinator, genus of European toads, 



unke. 



Bradypus, genus of edentate sloths. 

 Branchiosaurus, genus of extinct stego- 



cephal amphibia. 



Bufo, genus of amphibians, toads. 

 Buteo, genus of raptorial birds, hawks. 

 Butyrinus, genus of herring-like fishes. 



Cascilians, a group of legless tropical am- 

 phibians. 



Caiman, genus of crocodiles. 

 Calamoichthys, genus of ganoid fishes from 



Africa. 



Callopterus, genus of extinct ganoid fishes. 

 Camptosaurus, genus of extinct dinosaur 



reptiles. 

 Capitosaurus, genus of extinct stegocepha- 



lous amphibia. 



Carcharias, genus of sharks; sand shark. 

 Carinatae, birds with a keel to the sternum, 



includes all living birds except ostriches. 

 Carnivores, order of flesh-eating mammals; 



cats, dogs, bears, weasels, seals. 

 Castor, genus of rodents, beaver. 

 Ceratodus, genus of dipnoi (lung-fishes) 



from Australia. 



Ceratophrys, genus of So. American toads. 

 Cervus, genus of Ungulates, common deer. 

 Cestracion, genus of sharks from the 



Pacific. 



Cetacea, order of mammals, whales. 

 Chauna, genus of So. America crane-like 



birds; hooded screamers. 

 Chelonia, order of reptile turtles. 

 Chelone, genus of turtles, greec turtle. 

 Chelydra, genus of turtles, snapping turtle. 

 Chelydrosaurus, genus of extinct stego- 



cephalous amphibia. 

 Chimaera, genus of peculiar deep-water 



sharks. 

 Chimaeroids, order of shark-like fishes; 



Holocephali. 



Chiroptera, order of mammal bats. 

 Chlamydoselache, genus of primitive deep- 

 sea sharks from Japan. 

 Cholcepus, genus of edentates, sloths. 

 Chondrostei, order of ganoid fishes, stur 



geon. 

 Chrysophrys, genus of fishes; sea bream of 



Europe. 

 Chrysothrix, a genus of So. American 



monkeys. 



