G. R. Wieland — Upper Cretaceous Turtles. 119 



This finely preserved Carapace and Plastron is accompanied 

 by a perfect right Femur and left Humerus, with the proximal 

 end of the left Femur, the distal end of the right Humerus, a 

 perfect left Ulna, both ends of the Tibia, the first and second 

 left Metatarsalia, the 7th Cervical centrum, and some fragmen- 

 tary cervicals. 



All the parts just enumerated are believed to belong to one 

 and the same individual. Lest the question should be raised, 

 I state that the Carapace and Plastron are not composite. It 

 was proven that every portion belonged to the same individual. 



As now mounted and shown in Plates VI and VIII, almost 

 the only restoration required was due to the loss of portions of 

 the originally complete shell, at the time of collection. For- 

 tunately, in no case is such restoration hypothetical. Invari- 

 ably the outlines are delimited by unbroken opposing surfaces 

 or articulations. The most serious loss was in the case of sev- 

 eral of the neuralia, of which portions of the first and third, 

 and all of the sixth-ninth were lost ; but, fortunately, opposed 

 sutural unions of these parts with the pleuralia indicate the 

 outlines of all these bones. The pleuralia are practically com- 

 plete, and neatly join. All the marginalia but the left 11th 

 are present, complete, uncrushed, and suturally interlocked. 

 As will be noted, the 9th neural and the anterior pygal are 

 both distinctly assymmetric. 



That the accompanying limb bones belonged to this par- 

 ticular carapace and plastron, is indicated by all the availa- 

 ble evidence. When I began the study of this fossil as 

 received with its various parts dissociated and some of them 

 broken, I found accompanying it and bearing the same cata- 

 logue number, 783, a differently weathered left hyoplastral 

 fragment, and a perfect left hypoplastron of the same size, and 

 plainly of the same species as the plastron belonging to the 

 carapace. In addition, there were most of the pleuralia, and 

 several marginals of a much smaller turtle belonging to the 

 genus Lytoloma, a much more distinctly marine form. None 

 of these turtles can possibly be confused with the individual 

 here described, and they constitute all the parts of the original 

 shipment, as received from the West Jersey Marl Company of 

 Barnsboro, Gloucester Co., New Jersey, May 17, 1870.' These 

 turtles came from the large marl pits, in the " Upper Green- 

 sand Beds," one and one-half miles east of the Barnsboro 

 P. O., at which digging was abandoned about twenty years 

 ago. 



The present specimen, or 783 proper, clearly belongs to the 

 genus Osteopygis, as commonly used. Though, of course, as 

 Cope himself pointed out, this genus may ultimately be referred 



