2 Watson, The Saitropterygia of the Whitby Museum. 



The anterior end is broken, but must have been 

 rounded. There is a sh'ght constriction of the muzzle, 

 some lo cms. behind the anterior end, behind which the 

 sides of the skull slope outwards as relatively straight 



Fig. I. "SkviW oi ^^ Plesiosam-us'^ prophiqtius. Dorsal aspect. x i. 



lines to the articulars of the mandible. The skull as a 

 whole is depressed, though this may be partially due to 

 crushing. 



The surface is remarkably smooth, only a few rugo- 



