148 



STORY OP THE REPTILES 



It is these also which had the most finlike 

 paddles. The neck was very short (Fig. 

 66). Excepting the paddles they re- 

 semble alligators in general shape quite 

 strikingly. Some later forms were 



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Fig. 65. — Plesiosaurus doUchodirus, restored, x A. 



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

 feet and hands are found (Fig. 67). 



Fig. 66. — Ichthyosaurus communis, " tJj. 



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Fig. 67.— Left hind-paddle of Baptanodon discus (after Marsh), seen 

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

 nla ; I, first digit ; V, fifth digit. ' ' 



