88 



CRETACEOUS AND TERTIARY FISH. 



Myliobatis glottoides Cope. 



Myliobatis glottoides Cope, Proc. Amer. Philos. Soc. Phila., XI, 1870, p. 293. 

 Bocene bed at Farmingdale, Monmouth Co., N. J. 

 Hussakof, Bull. Amer. Mus. Nat. Hist. N. Y., XXV, 1908, p. 32, fig. 8 

 (type). 



Dental plate convex in longitudinal as well as transverse direc- 

 tion, composed of eight teeth, and lateral portions on either side 

 each slightly convex, and thin off to single series of lateral teeth. 

 On median line teeth suddenly swollen, forming together broad, 



Fig. 43. — Myliobatis glottoides Cope. (From Hussakof.) 



obtuse median ridge. Transversely each tooth is nearly straight, 

 extremity slightly and abruptly curved backwards. Worn sur- 

 face forms sub-triangular concavity. Basal surface obtusely an- 

 gulate in median line below. Vertical diameter of median teeth 

 about one-fourth horizontal diameter. Length (width) about 

 60 mm. (damaged). (Largely from Cope.) 



Cope says this species is thick-toothed like Myliobatis pachyo- 

 don Cope and Myliobatis holmesii Agassiz, but they are not so 



