9 o CRETACEOUS AND TERTIARY FISH. 



The above-described fragment is the only example I have seen 

 from our limits, and seems to agree with Myiiobatis magister, 

 which species has not been recorded before from New Jersey. It 

 is evidently a lower dental plate. Eastman has pertinent remarks 

 concerning this species. 1 



Formation and locality. One example from Vincentown (T. 

 M. Bryan) from the marl [Manasquan, K.]. 



Myiiobatis jugosus (Leidy). 



Myliobates jugosus Leidy, Proc. Acad. Nat. Sci. Phila., 1876, p. 86. (Eocene 

 marl beds of Burlington Co., N. J.) (No description). 

 Leidy, Journ. Acad. Nat. Sci. Phila., (2) VIII, 1877, p. 240, PI. 31, 

 figs. 4-5. Vincentozvn, Burlington Co., N. J. 



Transverse tooth nearly straight, ends angular and possibly ar- 

 ticulated with small lateral hexagonal teeth. Crown forms thick 

 median, transversely convex prominence, with sides extended, out- 

 wardly thin. Triturating surface transversely convex on median 

 prominence and becoming nearly flat on its reflected sides. An- 



Fig. 45. — Myiiobatis jugosus (Leidy). (From Leidy.) 



terior inclining surface of crown and projecting posterior sur- 

 face indicate somewhat imbricated arrangement of median teeth. 

 Base of crown opposite median eminence concave, and this cur- 

 vature at sides slightly deflected. Root straight on its attaching 

 surface. Vertical diameter about five in horizontal diameter. 

 Length (width) about 63 mm. (From Leidy.) 



1 Md. Geol. Surv. Eocene, 1901, p. 100, PI. 12, fig. 3, PI. 13, figs, ia, ib. 



