WiLLiaToa.] Cretaceous Fish&s. 251 



tinguished from those of Odontaspis, under which name some 

 were originally described. 



Recently Doctor Woodward " has identified a modern genus 

 of sharks, from the deep sea off Yokahama, Japan, with this 

 supposedly extinct type — Mitsukurina Jordan. 



Possibly the positive identification is premature, but there 

 seems to be no doubt of the close relationship of the two forms, 

 at least. 



Scapanorhyncus rhaphiodon. Plate XXVI, fig. 4; plate XXXII, fig. 5. 



Lamna {Odontaspis) raphiodon Agassiz, Poiss. Foss., in, p. 296, pL 



xxxvii-a, ff. 12-16. 

 Scapanorhynchus rhaphiodon Woodward, Cat. Foss. Fishes Brit. Mus., 



i, p. 353 (where additional synonymy will be found); Proc. Geol. Assoc. 



xin, p. 196 — Cenomanian, Russia and Galicia ; Cenomanian and Turonian, 



France, Saxony, and Bohemia; Cenomanian-Senonian, England; Upper 



Cretaceous, S. India: Upper Cretaceous of Texas, Mississippi, New 



Jersey: Benton Cretaceous of Kansas. 

 Lamna fc.rana Roemer. Kreideb. von Texas, p. 29, pi. i, ff. 7: Leidy, Rep. 



U. S. Geol. Surv., i, p. 304, pi. xviii, ff. 46-50; Cope, Cret. Vert., p. 296. 



Teeth of considerable size, slender, the anterior ones without 

 lateral denticles ; inner coronal face conspicuously and finely 

 striate. 



A number of teeth before me from the Cretaceous of New 

 Jersey and one from the Benton Cretaceous of Kansas agree 

 fairly well with the figures given by Leidy of specimens from 

 Mississippi, New Jersey, and "from near the mouth of Ver- 

 milion creek, in Kansas," and which agree with those from 

 Texas called Lamna fc.rana by Roemer. 



The specimens agree so well with the fkiropean species, 

 especially as figured by Woodward (1. c. ; I have no European 

 specimens for comparison), that I think there cannot be much 

 doubt of their identity, a conclusion suggested by Woodward. 



The Kansas specimen described by Leidy was said to have 

 been obtained by Hayden from a "gray sandstone from near 

 the mouth of Vermilion river/' The Vermilion in Kansas runs 

 it^ whole length through the Carboniferous in eastern Kansas ; 

 nor do I think there is any gray sandstone (necessarily Dakota 

 Cretaceous) in the state which will yield these teeth. In all 



11. Amer. Mag. Nat. Hist., Ill, p. 487 (1899). 



