352 



THE PORTLAND OOLITE PERIOD. 



CHAP. 



widening obliquely, into a nearly semicircular margin, which in the 

 middle is still 3*75 inches thick. Length, 26*3; breadth, 12*75. 



boo 

 MQG 



mm 



Diagram CXLVI. Paddle bones of Pleiosaurus brachydeirus. Owen. 

 Scale one-tenth of nature. 



The other bone is 22 inches long, and 10-25 broad. If the length 



