ZOOLOGY. 235 
2. Procaria. 
Thoracosauride ; Thoracosaurus, Leidy, Cope. 
Gavialide ; Gavialide, Gray; -- Holops Thecachampsa, Cope, etc. 
Crocodilide ; Crocodilide + Alligatoride, Gray. 
IV. SAUROPTERYGIA. 
Owen. 
2 Placodontide ; Placodus, ete. 
Plesiosauride ; Nothosaurus, Pistosaurus, Plesiosaurus, Pliosaurus, etc. 
Llasmosauride; Elasmosaurus, Cimoliasaurus, etc. 
£ 
V. ANOMODONTIA. 
Owen. ; ; 
Dicynodontide ; Owen, Paleontology. 
Oudenodontide ; Cryptodontia, Owen, Paleontology. 
VI. ICHTHYOPTERYGIA. 
Ichthyosauride. 
VII. RHYNCHOCEPHALIA. 
Protorosauride ; Protorosaurus, Meyer (elongate sacrum). 
Sphenodontide ; Hatteriide, Cope (Proceed. Acad. of Nat. Sci., Phila., 
1864). 
Rhynchosauride ; Rhynchosaurus, Owen. 
VII. TESTUDINATA. 
1. ATHECH. 
Sphargidide; Gray, Annals of Philosophy, 1825; Bell, Fitzinger, 
Agassiz. 
2. Crypropma. 
Cheloniide ; Gray, Annals of Philosophy, 1825; Agassiz. 
Propleuride ; Cope, Sillim. Am. Jour. Sci., 1870, p. 187. 
Trionychide ; Gray, Bell, Dum., Bibr., Agassiz. 
Emydide; Emydide and Chelydride, Agassiz. 
Adocide ; Cope, Proceed. Am. Philos. Soc., 1870, November. 
Cinosternidw ; Agassiz, Contrib. Nat. Hist. U.S.; Cope, Leconte (part). 
