G. R. Wiehcnd — On Marine Turtles. 



95 



Art. XIY. — Notes on the Cretaceous Turtles^^ Toxochelys and 

 Archelon^ with a Classification of the Marine Testudinata; 

 by G. R. WiELAND. 



I. The Front Flipper of Toxochelys latiremis. 



A FINE specimen of Toxochelys latiremis Cope* from the 

 Mobrara Cretaceous of Kansas (Accession No. 2491 of the 

 Yale coll.) includes a well preserved skull and lower jaw, six 

 cervical, and several dorsal vertebrae, anterior portions of the 

 carapace and plastron, and two nearly complete front flippers. 

 Although some of these bones are somewhat crushed, their 

 preservation is in all other respects exceedingly good. The 



Figure 1. Toxochelys latiremis Cope. Dorsal view of the left front 

 flipper, ■s.}4,. 



^30/n,.-.,o 



mE''' 



;t^^^^^© 



-..^^"^i^^y 



^ ,./ 



.& 



a, b, c, e, g, respectively the head, radial and ulnar processes, ectepicon- 

 dylar groove, and entocondyle of the humerus ; E, radius ; U, ulna ; In, 

 intermedium ; Ul, ulnare ; P, pisiform ; C, centrale ; 1-5, first-fifth carpalia ; 

 I-V, first-fifth metacarpalia. 



left of the front flipj^ers is evidently the more comj)lete, and 

 apparently only lacks the radiale, first carpale, and some distal 

 portions of the terminal phalanges of the third, fourth, and 

 fifth digits. The various elements, with the exception of 

 carpalia 4 and 5, were separated in collecting, or else had 

 originally been more or less scattered. JN'evertheless, the 

 arrangement of the parts, as shown in figure 1, is given with 

 considerable confidence as to the correctness of the main facts. 

 Hitherto our knowledge of the front flipper of Toxochelys 

 has been limited to the proximal half of the humerus and two 

 fingers as described by Case,f although the phalanges are men- 



* E. D. Cope, — Vertebrata of the Cretaceous Formations of the West, 

 vol. ii, Rep. U. S. Geol, Sur. of the Territories. Washington, 1875. 



t E. C. Case. — University Geol. Sur. of Kansas, Paleontology, part iv, 

 Toxochelys. Topelsia, 1898. 



