NORTH AMERICAN PLESIOSAURS. 
PALL OT: 
BY SAMUELES We WILLISTON. 
GON AIEWN SS,” 
Introduction, 
Bibliography and catalogue of North American Plesiosaurs, 
Dolichorhynchops osborni Williston. Description of skeleton, with restor- 
ation, 
Cimoliasaurus snowii Williston. Description of skull and neck, 
Brachauchenius lucasii Williston. Description of skull, vertebrae and ribs, 
Polycotylus latipinnis Cope. Description of paddle, 
Polycotylus ischiadicus Williston. Description of pelvis, . 
Plesiosaurus gouldii Williston. Description of dorsal vertebra, 
Propodial bones of young Plesiosaurs from the Cretaceous of Kansas, 
A peculiar food-habit of the Plesiosaurs, 
Plates I1.to XXIX, 
