1^8 



STORY OF THE REPTILES 



It is these also which had the most finhke 

 paddles. The neck was very short (Fig. 

 66). Excepting the paddles they re- 

 semble alligators in general shape quite 

 strikingly. Some later forms w^ere 





Fig. QiO.—Plesiosaurus dollchodirus, restored, x gV. 



toothless. It is in these that the six digits in the 

 feet and hands are found (Fig. 67). 



Fig. 66. — Ichthyosaurus communis, x ihxs. 



i®OOOor, 



JOOOooo^ 

 OOo o o 



Fig. 67.^Left hind-i)ad(ll(' of lUiptanodon discus (after Marsh\ seen 

 from below. One-eighth natural size. /, femur; t, tibia; i, fib- 

 ula ; /, first digit ; V, fifth digit. 



