24B 



Measttrcmcnts. 



M. 



LeDglli from (lie basis of Pectoral ray No. I. to Ventral ray 12 0.083 



Length I'roni the basis of P. I. to A. 1 0. 0985 



Lenglli of the ventral fni 0.0173 



Width of the ventral fin distally 0. Oi:5 



Length of tho basis of D. 2 0. 01G8 



Width of tho body 0.047 



Width of tho pelvic bones together 0. OIC 



Length of tho pelvic bones together 0. Olfi 



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

 From the bed No. 2 of tlic Cretaceous of Meek and Ilayden. Found 

 in digging a well at Bunker Hill station on the Pacific Railroad of Kansas. 



SELACHIL 



Remains of sharks and ray.s arc fur less abundant in the Cretaceous 

 of Western Kansas than in New Jersey, and are much exceeded in abundance 

 by the physostonious Aciinopferl, as the present account indicates. In the 

 region near Fort Hays and Salina, sharks' teeth are more frequently found. 

 The ccstiacionts arc, on the other hand, more abundant, since five spe- 

 cies of Pfi/chodus Ag. have been found in No. 3; in beds in various parts of 

 Kansas and Colorado. 



GALEOCERDO, Miill., Henl. 



Galeocerdo crassidens, Cope. 



Establislied on two teeth of the type of G. aduncus, Agass., i. c, with 

 one cutting-edge much more convex than the other. The processes of the 

 fang are rather narrow ; that beneath the convex cutting-edge the most so. 

 The apex of the tooth is very short, entirely plane, and stands over the middle 

 or inner edge of the wider process of the fang. The shorter cutting-edge is 

 straight or convex to near the base, where a short divergent heel develops 

 itself The anterior edge is strongly convex, and all the edges arc denticu- 

 late. One side is more convex than the other. No denticles. Cementum 



smool li. 



Measurements. 



M. 



Length of the basis ." 0.014 



Ilciglit of the crown • 0. 01 



Height of the root 0. OO") 



Width of tho tooth at tho contraction 0] 



