us 



STORY OF THE REPTILES 



It is these also which had the most finlike 

 paddles. The neck was very short (Fig. 

 60). Excepting the paddles they re- 

 semble alligators in general shape quite 

 strikingly. Some later forms were 



Fig. 65. — Plesiosaurus dolichodirus, restored, x gV. 



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

 feet and hands are found (Fig. 67). 



Fig. 66. — Ichthyomnrus cominunls. 



U'h'Gqooo, 



'o, 



:worp 000000°° 



/ 



oooooor; 



OOo o o 



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

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

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



