382 
Cistudo, genus of chelonia; box turtles. 
Cladoselache, genus of extinct sharks. 
Clupeide, family of fishes including herring, 
shad, alewives 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 
amphibians. 
Dromatherium, genus of extinct, primitive 
mammals. 
of stegocephalous 
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 cecilians. 
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, 
sharks, 
Galeopithecus, a flying mammal from Asia 
of uncertain position. 
Galeus, genus of sharks; dogfish. 
genus of selachians; tiger 
DEFINITIONS OF SYSTEMATIC 
NAMES. 
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; cecilians. 
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; 
Chimera. 
Hypogeophis, genus of Cecilians. 
Hyracoidea, order of mammals including 
Hyrax. - 
Ichthyophis, genus of cacilians 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. 
