424 GEOLOGICAL SURVEY OF THE TERRITORIES. 



evidently contracts from the anal fin, and was not probably very elon- 

 gate, but more as in Elops or Saurus. 



APSOPELIX SATJRIFORMIS, (COPE.) 



Scales large, ten longitudinal series to be counted across the obliquely 

 depressed body. No lateral line visible. About seventeen transverse 

 series between pectorals and ventrals. Yentral broad, when laid back- 

 ward nearly reaching anal, but far behind the pectoral ; anal probably 

 rather short, but this is not entirely certain. (Eadii, D. % — 12, P. 16, 

 Y. 12.) 



M. 



Length from basis P. I., to Y. 12 0. 083 



Length from basis P. I., to A. I 0985 



Length of ventral fin 0178 



Width of ventral fin, distally 013 



Length of basis D. 2 0168 



Width of body 047 



Width of pelvic bones together 016 



Length of pelvic bones together 016 



The size of this species is about that of a one-pound brook trout. 



From the bed No. 2 of the cretaceous of Meek and Hayden. Found 

 in digging a well at Bunker Hill Station on the Pacific Eailroad of 

 Kansas. 



SPHYR^ENIDtE. 



SPHYR^ENA CABIN ATA, (COPE.) 



(Proc. Acad. Nat. Sci., Phila., 1868, 92; Proc. Amer. Philos. Soc, 1869, 241.) 



Founded on a shed example of one of the long teeth, taken from the 

 matrix attached to the dorsal vertebrae of the Elasmosaurus platyurus. 

 The tooth is more elongate in outline than that of the &■. speciosa, 

 Leidy, i. e., more than twice as long as wide at the base. The anterior 

 margin is the more oblique, and its smooth face is margined by a faint 

 line posteriorly, and is continued to the extremity. The convex inner 

 face of the tooth behind is sculptured with five deep grooves, which are 

 separated by acute ridges, which do not extend over more than half the 

 length of the tooth. Length three lines. 



From the upper cretaceous of the neighborhood of Fort Wallace, 

 Kansas. 



Enchodus, sp. 



A premaxillary tooth of rather small size for the genus. The length 

 about one inch from the matrix attached to the under side of the dorsal 

 vertebrae of Elasmosaurus platyurus. It has two carinas separating 

 very unequal facets. Section of base subround. The specimen is im- 

 perfect. Near Fort Wallace. 



