184 BULLETIN UNITED STATES GEOLOGICAL SURVEY. [Vol.YI. 



PISCES. 



1. Clastes sp. 



Scales of tliis genus are moderately abundant. 



2. Pappichthys sp. 



Vertebrae of this genus occur in the collection. 



LAGERTILIA. 



3. Placosaurus. 



A species probably of this genus is not rare ; and vertebrae indicate 

 two or three species of lizards. 



TESTUDINATA. 



Tortoises are not abundant 5 a portion of the plastron of a species 

 probably of — 



4. Dermatemys — 



Being the only determinable fragment procured by Mr. Wortman. 



CROOODILIA. 



5. Orocodilus sp. 

 Not very common. 



RODENTIA. 



6. Plesiarctomys buccatus Cope. 

 Three individuals. 



7. Plesiarctomys delioatissimus Leidy. 

 Four individuals. 



8. Plesiarctomys delicatior Leidy. 



Eight individuals. 



CHIROPTEEA. 



9. Vesperugo anemophilus Cope. 



American Naturalist, 1880, p. 745. 

 Eepresented by the anterior part of a skull without lower jaw. Den- 

 tition: 1.1; C. 1; Pm. 2; M. 3. Posterior molar narrow, its posterior 

 external V rudimental; first and second molars subequal. Fourth 

 premolar elevated and acute, with an external basal cingulum ; second 

 premolar simple, acute. Profile steeply elevated behind orbital region, 

 less steep in front of it ; zygomas wide. Length from interorbital region 

 to above canine alveolus in front, .010 ; interorbital width, .005 ; width 

 of zygomas, .012 ; width between outsides of last molar teeth, .010 5 length 

 of molar series, .008; length of true molars, .004. 



BUNOTHERIA. 



T^NIODONTA. 



10. Calamodon cylindrifer sp. nov. 



The only individual of this species discovered by Mr. Wortman is 

 represented by fragments of the jaws, with several teeth, both loose 



