ELASMGBRANCHIL 



93 



Fig. 47. — Myliobatis rectidens Cope. (From Hussakof.) 



states it is from marl excavations at Harrisonville, Gloucester 

 County. [These marls are now referred to the Navesink-Hor- 

 nerstown bed. The Vincentown limesand also occurs here and 

 the Miocene clay appears on the higher slopes in the neighbor- 

 hood, K.] I have not seen this example. 



Myliobatis obesus (Leidy). 



Myliobates obesus Leidy, Proc. Acad. Nat. Sci. Phila., 1855, p. 396. Green- 

 sand of Burlington Co., N. J. 

 Leidy, Journ. Acad. Nat. Sci. Phila., (2) VIII, 1877, p. 236, PI. 31, fig. 

 6-10, PI. 34, fig. 44 (types of M. rugosus and M. obesus). (Pem- 

 berton and Mullica Hill.) 



Myliobates rugosus (nee Meyer 1844) Leidy, Proc. Acad. Nat. Sci. Phila., 

 !855, p. 395. Marl of New Egypt, Ocean Co., N. J. 



Dental plate arched in form, composed of four median teeth 

 and at least a row of lateral teeth each side. Enamel surface in 

 general evenly convex. Basal surface convex, swelling to median 

 longitudinal axis moderately. Transverse median sutures curve 



