JURA-TRIAS IN AMERICA. 461 



In the museum of Yale College there are now the remains of several 

 hundred individuals. These American Jurassic Dinosaurs were prob- 



Fig. 744.— 1. Bones of left fore-leg of Morosaurus grandis (after Marsh). One twentieth natural 

 size, s, scapula; c, coracoid; h, humerus; r, radius; u, ulna; uc, ulnar carpal; 1, first meta- 

 carpal; Vmc, fifth metacarpal. 2. Bones of left hind-leg of Morosaurus grandis. One twentieth 

 natural size, il, ilium; is, ischium; p, pubis; /, femur; t, tibia; /', fibula; a, astragalus; c, cal- 

 caneum; Vmt, fifth metatarsal. 



ably the largest land animals that have ever lived. Cope describes 

 one (Oamarasaurus) with a thigh-bone six feet long. Marsh describes 

 one (Atlantosaurus immanis) with thigh-bone about eight feet long. 



