GEOLOGICAL SURVEY OF THE TERRITORIES. 633 



A vertebra before me has thelongitiulinal bypopophysial keel of that 

 group, which termiuates m a very obtuse point. The ball looks exten- 

 sively upward. The upper articular extremity of the parapophysis is 

 short and obtuse, and the inferior equally so, and directed shortly down- 

 ward, their nrticular faces being continuous with each other. It sends 

 an obtuse latero-inferior keel backward, which terminates in front of 

 the ball. The angle connecting the diapophysis and zygapophyses is 

 strong, while the former was narrow ; in the specimens it is broken. 



Measurements. 



M. 



Length of centrum with hall, (below) 0090 



Elevation hehind, (total) 0135 



Elevation before, (total) 0110 



"\V' idth between j)arapophyse8 below 00y5 



Width of articular cup 0054 



1 )epth of articular cup 0043 



Depth of inferior keel 0020 



From the Bad Lands of Cottonwood Creek. 

 This species is allied to the Boavus of Marsh. 



BATEACHIA. 



The vertebral column and part of the cranium of a probably incom- 

 pletely developed tailless Batrachian were procured by Dr. F. V. 

 ilayden, from the tish-shales of the Green Eiver epoch, frci.n near Green 

 liiver City, Wyoming. They are not sufficiently characteristic to enable 

 me to determine the relation of the species to known forms, and it is 

 the oldest of the order yet discovered, the fossil remains of the known 

 extinct species having been derived from the Miocene and later forma- 

 tions. 



PISCES. 

 CLASTES, Cope. 



Order Oinglymodi : Mandibular ramus without or with reduced fissure 

 of the dental foramen, and without the groove continuous with it in 

 Lepidosteus. One series of large teeth, with small ones exterior to 

 them in the dentary bone, the inner superior aspect of that bone with- 

 out prominent deutiferous or rugose rib. 



The species of this genus resemble in many ways the Le^yidostei of the 

 present day. Their scales are rhombic and pierced by a duct on the 

 lateral line. The cranial bones are ornamented by tubercles of ganoine, 

 distributed variously according to the species. Some of these fishes 

 reached a large size, exceeding any now livings others resembled the 

 true Lepidostei in this respect. 



The characters assigned to this genus are derived from the under 

 jaw, and I have observed it in two species, one which I suppose to be 

 the Lepidosteus glaher, Marsh, and the other C. cycUferus, Cope. 



Clastes anax, Cope, spec. nov. 



Represented by some cranial bones, and especially by a posttemporal, 

 which indicate a very large species of gar, two or three times as large 

 as the alligator-gar of the Mississippi, [Atractosteus ferox.) The bone 

 has a free ovate posterior outline, and its superior surface is covered 



