ICHTHTOSAURIDJ«;. 



43 



Ichthyosaurus communis. — Dorsal aspect of the left pectoral and ventral aspect 

 of the right pelvic limb of No. 41849. \. h, humerus ; r, radius ; u, ulna ; 

 i, intermedium ; t, tibia ; /, fibula. The vertical lines show the pro- 

 portionate length of the pectoral limb to the skull ; the longer line being 

 the length of the skull. 



and pectoral limbs are exposed ; the left pectoral limb 

 being thrown to the front. The paddles are nearly perfect 

 and are broad and ovate in contour ; the pectoral one 

 containing 8 and the pelvic 6 longitudinal rows of phalan- 

 geals. The length of the pectoral limb (fig. 20) is 0,255 

 (10 inches), and its greatest width 0,090 (3*5 inches); 

 the length of the skull being 0,432 (17 inches). The 

 vertical lines in fig. 20 show the proportionate length of 

 the paddle to the skull. In the pelvic limb the inter- 

 medium articulates with the femur (fig. 20). 



Purchased, 1870. 



1064. Cast of a slab showing an imperfect skeleton of medium sizo ; 

 the original was obtained from Lyme-lvegis, and is pre- 



