Twenty-five vertebrate species in all, have, hitherto, constituted the Oligocene fauna 

 of the Cypress hills : this number is now raised to over fifty. The following is the fauna as 

 known to date : — 



Class PISCES. 



Order AOTINOPTERYGII. 



Suborder Protospondyli. 



Family Amiidce. 



* Amia ivhiteavesiana, Cope. 



* Amia macrospondyla, Cope. 

 + Amia exilis, sp. nov, 



Aetheospondyli. 

 Lepidosteidoi. 



Lepidosteus longus, sp. nov. 



* + Rhineastes rhceas, Cope. 



* + Amiurus cancellatus, GoT^e. 

 ^ + Amiurus maconnelli, Cope. 



Anosteira ornata ? Leidy. 



Nematognathi. 

 Siluridce. 



REPTILIA. 



chelonia. 

 Cryptodira. 

 ChelydridcB. 



Testudinidce. 



* + Stylemys nebrascensis, Leidy. 



+ Testudo exornata, Lambe. 



Trionychia. 



TrionychidoR. 



* + Trionyx leucopotamicus, Cope. 



+ squamata. 



Lacertilia. 



Anguidce. 

 + Peltosaurus granulosus, Cope. 



QPHIDIA. 



Palceophidce. 

 + Ogmophis compadus, sp. nov.- 



+ OROOODILIA. 



EusucniA. 

 Crocodilidoe. 

 + Crocodilus prenasalis f Loomis. 



The signs before the names of species or groups signify as follows:— 

 * Represented in one or more of the collections made previous to 1904 ; but not in that of 1904. 

 + Represented in collection of 1904 ; but not in previous ones. 

 * + Represented in the 1904 as well as in one or more of the previous collections. 



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