184-6.] STUTCHBURY ON A NEW PLESIOSAURUS. 4l5 



Humerus. in. loths. 

 Length from the extreme convexities of the proximal and distal 



extremities 13 7 



Diameter across the head 3 3 



Ditto ditto great tuberosity 3 7 



Ditto at half its length 3 3 



Ditto at its distal extremity 7 



Anterior edge nearly straight, posterior edge deeply concave ; depth 



of the concavity 1 8 



Radius, 



Length from proximal to distal terminations 4 6 



Breadth across proximal extremity 3 5 



Diameter at half its length '.. 2 



Diameter at distal extremity 2 7 



Ulna, 



Greatest length of its posterior or convex edge 4 3 



Length of its anterior or concave edge 3 3 



Breadth at half its length, being from the deepest part of the ante- 

 rior concavity to the posterior convexity 3 3 



Depth of anterior concavity or versed sine 5 



Carpal hones. — Six in number. 



Diameter of the largest 2 3 



Ditto smallest 1 



The Metacarpal and Digital Phalanges are expanded at their ex- 

 tremities, the diameter of their centres being as two to three to that 

 of the extremities. 



The paddles not being quite complete, the number of the digital 

 phalanges cannot be stated. 



Pelvis, 



Antero-posterior dimensions of the Pubic bones along the median 



hne or symphysis 8 6 



Diameter of the Ischium taken in the same direction 11 



Length of the lUum (^both of which are remarkably well preserved) 8 5 



Diameter across the extremity which forms part of the acetabulmn 3 4 



Diameter across the sacral extremity 2 1 



Ditto at half its length 1 4 



Femur. — The head of each femur is broken off, but judging from 

 appearances, I take it to have been about the same length as the 

 humerus. 



Length from the trochanter to its distal extremity 9 



Diameter at half its length ? 3 2 



Ditto across distal end 6 4 



The anterior edge is slightly concave, as also the posterior edge, 

 but not so concave as the posterior edge of the humerus. 



Tib 



la. 



Length 4 5 



Diameter at femoral extremity 3 9 



Ditto at tarsal 3 10 



Ditto at half its length 2 7 



2 e2 



