636 GEOLOGICAL SURVEY OF THE TERRITORIES. 



Measurements. 



M. 



Depth dentary at sympLysis 003 



Depth dentary at middle OIIS 



Depth deutary at eleventh tooth 013 



Thickness deutary at eighth tooth Old 



Pappiohthys Lv13vis, Cope, spec. uov. 



Eepresented by various fragments including deutary and vertebral 

 boues. The former ditfers 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 deutaries 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. scJerops. A dorsal vertebra is but little wider than deep, and is trun- 

 cate below, presenting a prominent iufero-lateral angle. 



Measuremc7its. 



Depth of dentary near middle 037 



Thickness of dentary near middle 012 



Depth centrum of vertebra - 029 



Width centrum of vertebra 038 



Leuiith ceutrum of vertebra 009 



^e>^ 



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 vertebr;© of the species above described is the lack of 

 distinction between the articular facets of the adjacent neurapophyses. 

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

 P. Icevis and P. j^licatiis. 



Measurements. 



M. 



Length of centrum, dorsal 006 



Depth of centrum, dorsal 014 



Width of centrum, dorsal 018^ 



Depth centrum, caudal 0115 



Width centrum, caudal 0105 



Length ceutrum, 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 type of articulation with the neurapophyses as in P. pli- 

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

 physes, from another locality, (Upper Green River,) presents the san^e 

 subquadrate articular faces slightly constricted iu the middle. Hence 

 I suspect this character to be characteristic of the species. 



Pappichthys coesonii,* 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. 



