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 ampiiibians, 

 largely American. 



Amia, genus of ganoid fishes peculiar to 

 America. 



Ammocoetes, the larval stage of the lam- 

 preys. 



Amniotes, division of vertebrates with 

 anuion 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- 

 brje, type of group of Leptocardii. 



Amphipnous, eel-like fishes from India. 



Amphisbxnans, 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. 



Anthroptoids; sub-order of primates includ- 

 ing the higher ap>e3 and man. 



Anura, order containing the tailless am- 

 phibians; frogs and toads. 



Aquila, genus of birds including eagles. 



Archaiopteryx, 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. 



»7 4»; 



Artiodactyla, ungulate mammals with even 

 number of toes; cattle, sheep, deer. 



Astroscopus, genus of electric fishes; 

 marine. 



Atelodus, genus of two-horned rhinoceros. 



Aves, the class of birds. 



Bdellostoma, genus of myxinoids; hag 



fishes of the Pacific. 

 Bclone, 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. 



Caecilians, 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. 



Carinatx, birds with a keel to the sternum, 

 includes all living birds except ostriches. 



Carnivores, order of fiesh-eating mam- 

 mals; 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 American craoe-likc 

 birds; hooded screamers. 



Chelonia, order of reptile turtles. 



