2 Watson, New Genera of Upper Liassic Plesiosaiirs. 



Eretinosaurus dubius, Blake. 



Founded on a complete skeleton which was in the 

 possession of Mr. Brown Marshall, of Whitby. This 

 specimen can no longer be found. Blake's description is 

 quite inadequate, but he suggests that the species is 

 identical with Seeley's P. viacropterus. The pectoral 

 girdle was well displayed from the ventral surface, and is 

 certainly of the Eretmosaurus type, if Blake's figure is at 

 all accurate. 



" Plesiosaurus " Crauipto7ii, Carte and Baily. 



Lyddeker regards this species as belonging to v. 

 Meyer's genus Thauviatosaurus, which was founded on 

 some imperfect teeth and vertebrae from the Lower 

 Oolites. I think it is probably safer to use Seeley's genus 

 Rhomaleosauriis for this species until more is known of 

 the type of Thaumatosaurus. 



The type specimen is a very large skeleton in the 

 Dublin Museum. The description is inadequate, details 

 of the vertebrae being wanting. The girdles are almost 

 completely concealed, and the arrangement of the limbs 

 is not natural, as Lyddeker has already recognised. 



■" Plesiosaurus " prophiquus, Blake. 



Type skeleton in the Whitby Museum. 



Lyddeker regards this species as a Thaumatosaurus 

 in his definition of that genus. 



The vertebrae have not been described in detail, and 

 are much obscured by matrix. 



The girdles are only represented by fragments which 

 are, I think, not in the positions in which they were found, 

 the left fore limb is artificially arranged and the sup- 

 posititious right humerus is the femur of another species. 

 The arrangement of the ribs is conventional. This species 



