AND AVES OF NORTH AMERICA. 



153 



Width costal bono, 

 Thickness proximally, 



" dlsially, 



" at base of free rib, 



Sulci in an inch, five. 



Linen. 

 25. 



3. 



4.5 



G. 



Locality — The upper bed of Green Sand in Monmouth Co., N. J. In the collection of 0. B. Kinne, Director 

 of the marl pits at Squankum. 



TRIONYX BUIEI, Cope, Sp. Nov. 



This species is represented by numerous costal bones in a more or less fragmentary condition. They resemble 

 somewhat those of the T. pennatus. There are narrow transverse ridges extending in slightly curved lines from the 

 margins to a distance inward on the costal, bones. Near the middle of the length of the bono they are interrupted by 

 irregularities and cross-ridgos, producing a honey-comb arrangement, while more distally the ridges and included 

 grooves arc, more continuous. Five intervals are included in six lines. Thickness of the costal bono at lateral suture, 

 2.2 lines. 



From the Miocene, nsarMt. Olive, Duplin County, N. C. Obtained by the Geological Survey of North Carolina 

 by Prof. W. C. Kerr, Director. Dedicated to Dr. 1). 11. ISuie, of Wilmington, N. C, a geologist and naturalist. 



TRIONYX PRISCTJS, Leidy. 



Proe. Acad. Nat, Sci., 1852, p. 329. Cretaceous Reptiles, Tab. 

 Prom the Cretaceous green-sand of New Jersey. 



TRIONYX LIMA, Cope. 

 Proe. Acad. Nat. Sci., Ph.Ua., 1800, p. 12. 



This species is known by a costal bone, of which the proximal part has been broken away. It is the largest 

 of our Trionyches. 



The distal end of the hone is oblique and slightly concave; it is remarkably thick. The superficial sculp- 

 ture is its strongest mark. This consists of numerous narrow, much elevated transverse ridges, which are finest 

 and most closely arranged distally. They are irregular in their course, presenting occasional short interruptions, 

 and rarely inosculate. The irregularities are most abundant proximally. The distance between the ridges is greater 

 than the width of the same. There are five in a half inch distally, and 4.5 proximally. Probably on the proximal 

 extremity of the costal bones the ridges are much more irregular, as they are generally less longitudinal there than 

 distally in all our species. 



Thickness at middle, distally, lines; thickness at fractured edge, proximally, linos. 



Prom the Miocene marl of Cumberland Co., N. J. Pound by John Hummel. 



CHELONIIDAE. 



No species referable with certainty to the present family, havo boon found in North American bods older than 

 the Tertiaries. 



CHELONE GRANDAEYA, Leidy. 



Proe. Acad. Nat. Sci., Phila., 1801, p. 303. 



This largo species was originally characterized from a number of vertebral bonss. Since then more abundant 

 material has enabled me to ascertain its characters more precisely. 

 AMERICA. PIIILO. SOO. — VOL. XIV. 39 



