FORMATIONS OF THE NACIMIENTO GROUP 731 



The following fossils other than mammalia have been found in 

 beds of the Nacimiento group in New Mexico: 



Reptilia 

 crocodilia 

 Several new undescribed species 



TESTUDINATA 



Conchochelys admirabilis Hay (Nacimiento) 

 Plastomenus acupictus Hay (Torrejon) 

 Aspideretes singularis Hay (Torrejon) 

 Platypeltis antiqua Hay (Torrejon) 

 Plastomenus? communis Cope 

 Chelydra crassa Cope 

 Dermatemys sp. 

 Compsemys sp. 

 Emys sp. 



RHYNCOCEPHALIA 



Champsosaurus australis Cope 

 Champsosaurus puercensis Cope 

 Champsosaurus saponensis Cope 



OPHIDIA 



Helagras prisciformis Cope 



AVES 



Fragments of bones of undetermined species 



MOLLUSCA 



Helix nacimientensis 

 Helix adipis 

 Pupa leidyi (?) 

 Unio rectoides {?) 



Flora 

 Wood of dicotyledonous and palm trees, undetermined 



The fossil mammal teeth shown in Fig. 9 were collected by the 

 writer in 1907 from the Torrejon formation eight miles northeast 

 of Encina Spring, New Mexico (see Plate I). These fossils are in 

 the hands of Mr. James W. Gidley, custodian of fossil mammals 

 in the National Museum. He furnishes the following identifications 

 of them which are subject to correction. There are new genera and 

 species represented which will be described fully in a forthcoming 

 paper by Mr. Gidley. 



