1903.] Hay, North American Cretaceous Fishes. 75 



grooves running along the inner face, one close to and parallel 

 with each cutting edge, are somewhat more distinct; but 

 these characters are hardly satisfactory. On account of the 

 little that is known about R. tetrcBcus and on account of the 

 different geographical distribution, the two species may best 

 be regarded for the present as distinct. 



Enchodus gladiolus Cope. 



Cimolichthys gladiolus Cope (E. D.), Proc. Amer. Philos. Soc. XII, 



1872, p. 353- 

 Phasganodus "^gladiolus Cope (E. D.), Bull. U. S. Geol. and Geog. 



Surv. Terrs. I, No. 2, 1872, p. 43; Vert. Cret. Form. West, 1875, 



pp. 235, 277. 

 Enchodus gladiolus Cope (E. D.), Vert. Cret. Form. West, 1875, p. 



301, pi. xlii, fig. 7. — Woodward (A. S.), Cat. Foss. Fishes, IV, 



1901, p. 204. — Hay (O. p.), Bibliog. and Cat. Foss. Vert. N. A. 



1902, p. 389. 



The type of this species was a single detached tooth, and 

 this has not yet come to light in the examination of the Cope 

 collection. Cope states (Vert. Cret. Form. West, p. 301) that 

 he had a better specimen; but while he figured the type 

 tooth, he did not figure or describe the better example. In 

 the collection there is found a specimen which bears the label 

 in Cope's handwriting "Enchodus f gladiolus," the interroga- 

 tion doubtless belonging, accord- 

 ing to Cope's usage, with the 

 specific name. To these remains 

 have been given the number 1818. 

 The specimen presents the left 

 palatine, with its great tooth com- 

 plete ; the left ectopterygoid, with 



Fig. 56. Enchodus gladiolus Cope. 



several teeth; and the tip of the No. iSis. x i. jaws. </<?«., demary ; 



ec.pt., ectopterygoid ; pal., palatine. 



left dentary with its fang. As 



shown in Fig 56, the ectopterygoid has been turned so that 

 the teeth point in a direction opposite to that of the palatine 

 teeth. On another block and apparently belonging to the same 

 individual is shown the upper surface of the hinder half of the 

 skull. The palatine fangs differ from those of E. dolichns in 



