CEYPTOCLEIDUS OXOIS'IENSIS. 191 



PeMs : 



Ilium : length 17'2 



greatest width at upper end 7'3 



„ „ lower end 5'6 



Pubis : greatest length 25-3 



„ width (from antero-external angle to sym- 



physial border) 30"5 



\\ idth of articular head lO'O 



width between the antero-external angles of the two 



pubes , 55'5 



Ischium : greatest width 18'1 



width of articular head 8'8 



length of expanded portion 18'4 



width of neck 5-2 



Hind limb : 



Pemur : length 27"0 



diameter of head ... 7"9 



greatest width of upper end 9-5 



width of shaft at narrowest 5'8 



width of distal expansion 16*0 



Tibia : greatest length 5*7 



width 8-0 



Fibula : greatest length 5-1 



,, width 7'9 



E. 2S62 (Leeds Coll. 27). Imperfect skeleton of a large adult individual. The parts preserved are: — 

 basioccipital, part of basisphenoid, atlas, axis and twenty-eiglit other cervical vertebras, 

 about twenty-three pectorals and dorsals and thirty sacrals and caudals ; scapulfe, 

 coracoids, clavicles, fore paddles wanting only a carpal and some distal phalanges, portions 

 of ilia, ischia and pubes, liind paddles wanting some distal phalanges, ventral ribs (text- 

 fig. 86) embedded in matrix and showing their relations to one another and to the pelvis. 

 In a short interval between the ventral ribs and the pubes there is a peculiar wrinkled 

 surface which may represent a portion of the abdominal wall. 



This skeleton is that of a large and old individual, in which ossification is very far 

 advanced. This is shown by the fact that all the neural arches, and, in the cervical and 

 caudal regions, the ribs, are fused with the centra. The ossification of the limb-bones 

 also is very far advanced, the heads of the humeri and femora being sirongly convex, 

 while the upper end of the tuberosity in the humerus and of the trochanter in the 

 femur are much more clearly defined than in most specimens. In the shoulder-girdle 

 all the sutures between the coracoids and scapulae are obliterated, and the clavicles, 

 which are very closely adherent to the visceral face of the scapulas, are fused with one 

 another in the middle line. 



The specimen is also interesting as showing the exact arrangement o£ the elements ol 

 the ventral buckler (text-fig. 86). The general relations of the postei-ior rows of ventral 

 ribs to the pelvis can also be made out, though some displacement may have taken place 

 in the course of the flattening out that the carcass has undergone. In the present 



