248 University Geological Survey of Kansas. 



with. these last specimens and apparently belongs to the same 

 species, if distinct. Their resemblance to Odontaspis kopingen- 

 sis Davis likewise cannot be denied, but the lateral denticles are 

 more triangular in shape. 



Lamna sulcata. Plate XXIV, figs. 1-lb. 



Otodus sulcatus Geinitz, Char. Schicht. u. Petriffact, saechs-boehm Krei- 

 deb. 5, pi. iv, f. 2. 



Otodus divaricatus Leidy, Ext. Vert. Fauna, p. 305, vol. xvin, ff . 26-28 ; 

 Cope, Cret. Vert., p. 295. 



Lamna sulcata, Woodward, Cat. Foss. Fishes Brit. Mus., i, p. 398 (where 

 additional synonymy will be found); Proc. Geol. Assoc., xiii, p. 197; 

 Williston, cf. cit. 37 — Cenomanian and Turonian, England, France, 

 Belgium, Saxony. Bohemia; Senonian, England; Cretaceous, Texas, 

 (Leidy); Jewell county, Kansas, (Cope); Mississippi (Cope). 



"Teeth very robust, the crown sometimes attaining a height 

 of nearly 50 mm. Outer face of crown slightly convex, gener- 

 ally uneven ; both the inner and the outer faces with more or 

 less prominent series of vertical wrinkles near the base, usually 

 irregular. A single pair of large, acuminate lateral denticles, 

 slightly divergent, often incompletely separated from the prin- 

 cipal cone. Root with a considerable inward prominence im- 

 mediately below the base of the crown." 7 



"A name given to very large, robust teeth with vertically 

 wrinkled crown and slightly divergent acuminate lateral denti- 

 cles. There are specimens in the British Museum from un- 

 determined horizons in the chalk of Kent, Surrey, and Sussex." 8 



This species is unknown to me. It occurrence in Kansas is 

 given on the authority of Cope. The horizon is evidently the 

 Benton. 



Lamna mudgei. 



Lamna mudgei Cope, Cret. Vert., p. 207, pi. xn, ff. 11, 12; Williston, cf. 

 cit. 38 — Niobrara of Kansas, Greensand of New Jersey. 



" Indicated by three teeth from the Niobrara epoch of Kan- 

 sas and one from the Greensand No. 4, from New Jersey. 

 These teeth are rather stout, especially at the base, and the 

 crown is not very elongate. The root is excessively protuber- 



7. Woodward, 1. c. 



8. Woodward. 



