12 Field Columbian Museum — Geology, Vol. II. 



PANTOSAURUS. 

 Marsh, Report Geological Congress, 1891, 159; Amer. Journ. Sci. 

 xli, 1895, 406; Parasaurus Marsh, Amer. Journ. Sci. xliii, 

 338, 1891 (preoccupied). 



STRIATUS Marsh, Amer. Journ. Sci. xliii, 338, 1891 (Parasaurus); ibid, 

 i, 406, 1895, ff. — Baptanodon Beds, Wyoming. 



Based upon a posterior cervical centrum. "Vertebrae strongly 

 grqoved. Neck long and slender, the vertebrae preserved resemble 

 most in form and size those of Plesiosaurus plicatus Phillips." 



EMBAPH1AS. 

 Cope, Proc. Amer. Phil. Soc. 1894, 111. 

 CIRCULOSUS Cope, 1. c. — Pierre Cretaceous, South Dakota. 



This genus and species were founded on three vertebrae, cervical 

 and dorsal. The cervicals are short, with persistent sutures. Ribs 

 double-headed(P). 



MEGALNEUSAURUS. 

 Knight, Amer. Journ. Sci. v, 1898, 375. 



rex Knight, Science, 1895, 449 {Cimoliasaurus)\ Amer. Journ. Sci. v, 

 I 8g8, 379, ff. 1-3. — Jurassic, Wyoming. 



A large portion of the skeleton of the type species is known; the 

 parts so far described are the vertebrae and limbs. 



■ DOLICHORHYNCHOPS. 



YYilliston, Kansas Univ. Sci. Bulletin, No. 9, p. 141, Sept. 1902. 

 *osborni Williston, 1. c. — Niobrara Cretaceous, Kansas. 



BRACHAUCHENIUS. 



Williston, postea. 

 *lucasi Williston, postea. — Benton Cretaceous, Kansas. 



