20 Bulletin American Aluseum of Natural History. [Vol. XII, 



I. PUERCO. 



All the types and described specimens are preserved in the 

 American Museum of Natural History. The localities of all are 

 in northwestern New Mexico, west of the divide between the Rio 

 Grande and San Juan Rivers. 



MULTITUBERCULATA.i 



PLAGIAULACID^. 



Catopsalis foliatiis (rope. 

 Polymastodon taoensis Cope. 



Polymastodon latimolis Cope. 

 Polymastodon attemtatus Cope. 



' ' sclcnodus Osborn & Earle, 



Neoplagiaulax americanus Cope. 

 Neoplagiaulax sp. 



CREODOXTA. 



OXYCL.^NID^. 



Oxyclanits cuspidatus (Cope.) 



simplex (Cope.) 

 Protochriacus priscus (Cope.) 

 Frotocliriacus hyattiamis Cope. 



Loxolophus adapinus Cope. 

 Proiocliriacus aticnuatus O. & E. 



TRIISODGNTID.^. 



Triisodon quivirensis Cope. 

 " heilprinianus Cope. 



Triisodon rusticus Cope. 



Triisodon biculminatus Cope. 



Conoryctes crassicuspis Cope. 



Sarcothraustes corypliEeus Cope. 



Mioclsenus bathygnathus Cope. 

 Triisodon gaudrianus (Cope). 



INCERT. SED. 



Oxyacodon apiculatus O. & E. 



Oxyacodon agapetilltis (Cope). 

 Carcinodon fillioliaiiiis (Cope). 



CONDYLARTHRA. 



PERIPTYCHIDi^. 



Periptychus ' coarctatus Cope. 



Periptychus brabensis 0. ^ E. 

 Ectoconus ditrigonus (Cope). 

 Hemithlaeus kowalevskianus Cope. 

 Conacodon entoconus (Cope). 



Anisonchus coniferus Cope. 

 Conacodon cophater (Cope). 

 Anisonchus gillianus Cope. 



Hemithlaeus apiculatus Cope. 



? Zetodon gracilis Cope. (Indeter- 

 minate.) 



PHENACODONTID^. 



Protogonodon pentacus (Cope). 

 Protogonodon stenognailius Matthew. 



MIOCL/ENID.B. 



Mioclccmis turgidunctitus Cope. 

 EDENTATA. 



STYLINODONTID^. 



Hemiganus otariidens Cope. 



CONORYCTID^. 



Onychodectes tissonensis Cope. 

 Onyc/iodecfes rams O. & E. 



INDETERMINATE SPECIES. 



Mioclasnus interruptus Cope. 



" riltimeyeranus Cope. 



II. TOR RE/ ON. 



All the types and described specimens are preserved in the 

 American Museum of Natural History. The localities are in 

 northwestern New Mexico, on either side of the divide between 

 the Rio Grande and San Juan Rivers. 



* The name Periptychus is perhaps preoccupied by Periptyches. If this be the case, the 

 name Catatklceus, proposed for the permanent dentition of the same species, takes its place, 

 C. rhabdodon being the type. 



