Plesiosauridae 

 Elasmomuridae 



16 



= Plesiosauridae J Cope, P. A. A. A. 



S., xix, 235, 1871 (name only)/* 

 = Elasmosauridaey Cope, Tr. A. P. S., 



n. s., xiv, 1869, p. 47.' 



17 45 



Order ANOMODONTIA. 



(Anomodontia, Owen.) 



Dicynodontidae = Dicf/nodontidae, Cope, P. A. A. A. 



S., xix, 235, 1871 (name only).'" 

 Oudenodontidae — Oudenodontidae, Cope, P. A. A. A. 



S., xix, 235, 1871 (name only).*' 



Order ICHTHYOPTERYGIA. 



Ichthyosauridae = Ichthyosauridae, Cope, P. A. A. A. 



S., xix, 235, 1871. 



Order RHYNCHOCEPHALIA. 



Protorosauridae = Protorosauridae, Cope, P. A. A. A. 



S., xix, 235, 1871 (name only).*' 

 Sphenodontidae = Splienodontidae, Cope, P. A. A. A. 



S., xix, 235, 1871.*' 

 Bhynchosauridae — Rhynchosauridaej Cope, P. A. A. A. 



S., xix, 235, 1870 (name only).' 



" Notho3auru8, Pistoaaurus, Plesiosaurus, Pliosaurus, etc. 



^ Elasmosaurus, Cimoliasaurus, etc. 



<* Dicynodontidae, Owen, Paleoutology. 



■"Cyptodontia, Owen, Paleonto'ogy. 



■" Protorosaurus, Meyer (elongate sacrum). 



<9Hatteriida«, Cope, Proc. Acad. Nat. Sc. Phila., 18G4, 225-7. , ' 



*" Rbynchosanrus, Owen. 



50 



