636 GEOLOGICAL SURVEY OF THE TERRITOEIES. 



Measurements. 



Depth dentary at symphysis 0^3 



Depth dentary at middle 03S 



Depth dentary at eleventh tooth 048 



Thickness dentary at eighth tooth 018 



Pappichthys l^yis, Cope, spec. nov. 



Eepresented by various fragments including dentary and vertebral 

 bones. The former differs from that of the species just described in the 

 smaller size of its teeth, there being six in a space occupied by but four 

 in it, at a point where the dentaries of equal depth. In other words, 

 there are four in .0250'". The alveolar faces are also much more 

 oblique, being in fact continuous with the inner face of the bone. The 

 external face of the dentary is smooth, and thus different from that of 

 P. sclerops. A dorsal vertebra is but little wider than deep, and is trun- 

 cate below, presenting a x^rominent infero-lateral angle. 



Measurements. 



M. 



Depth of dentary near middle 037 



Thickness of dentary near middle 012 



Depth centrum of vertebra 029 



V/idth centrum of vertebra 038 



Length centrum of vertebra 009 



From the bluffs of Cottonwood Creek. 



Pappichthys symphysis, Cope, species nova. 



Established on a number of vertebrae of an individual of much smaller 

 size than any of the preceding, and which was about the size of the 

 largest growth of A. calva. The form of the dorsal centra is a little 

 wider than deep; the caudal deeper than wide. What distinguishes 

 these from the vertebras of the species above described is the lack of 

 distin-ction between the articular facets of the adjacent ueurapophyses. 

 These are almost confluent, instead of nearly or quite isolated as in the 

 P. Icevis and P. plicaius. 



MeasiLrements. 



M. 



Length of centrum, dorsal 006 



Depth of centrum, dorsal ■ 014 



W idth of centrum, dorsal 018 



Depth centrum, caudal 0115 



W idth centrum, caudal 0105 



Length centrum, caudal - 0040 



The dorsals of the above specimen have short diapophyses and might 

 be regarded as posterior, and the anterior might be anticipated to pre- 

 sent a different t^'pe of articulation with the ueurapophyses as in P. j?/i- 

 catus. But a vertebra of the same size and form, but with long diapo- 

 physes, from another locality, (Upper Green River,) presents the same 

 subquadrate articular faces slightly constricted iu the middle. Hence 

 I suspect this character to be characteristic of the species. 



Pappichthys consois^n,* Cope, spec. nov. 



This species is, perhaps, rather smaller than the last. A dorsal ver- 

 tebra with inferior diapophyses is but little wider than deep. The 



* Dedicated to Dr. Joseph Corson, formerly stationed at Fort Bridger, to whom I am 

 under many obligations, professional and otherwise. 



