MESOZOIC TIME — TRIASSIC AND JURASSIC. 



,753 



Kg. 1178; it is reduced to -i- the natural size, excepting the two tracks 

 lettered a, which are enlarged views of the tracks of the line b. No tracks 

 of fore feet have been found with them, and hence it is thought possible that 

 some are tracks of Birds. But no positive evidence of Birds has been found. 

 The collection of Amherst College, and that of Yale at New Haven, 

 contain each several thousands of tracks from the Connecticut valley ; a fact 

 that gives some idea of the abundance of life on the continent in Triassic time. 

 Other estuaries and valleys besides those now occupied by Triassic beds were 

 probably equally populous. Twenty-one consecutive tracks of the Otozoum 

 were exposed to view in 1874, at one of the quarries at Portland, Conn. 



Bones of the Dinosaurian Reptiles were first found in 1818, in the sand- 

 stone of East Windsor, Conn., and near Springfield, Mass. ; and the foot of one 

 1179. from the latter locality was figured in 1865 by Hitchcock, 



who (in allusion to the length of the bones) named the 

 species Megadactylus polyzelus; and in 1870 the Reptile 

 was described and pronounced a Dinosaur by Cope. Remains 

 have since been discovered in North Carolina, Pennsylvania, 

 and Prince Edward Island, and again in Connecticut. 

 Near Manchester, Conn., large portions of four skeletons of 

 the same genus, and of another, Ammosaurus, have been 

 obtained by Marsh. Eig. 1179 represents a restoration 

 published by him in 1893. The name Megadacty- 

 lus being preoccupied, it is changed by him 

 to Anchisauriis. It was one of the car- 

 nivorous Dinosaurs that left tracks 

 on the sandflats and mudflats of 

 the Connecticut valley estuary. 



p 



\IS 



Fig. 1179, restoration of Anchisaurus colurus Marsh (XiV). p, pubis ; ts, ischium ; /, femur. 



Other Dinosaurs are : Clepsysaurus Pennsylvanicus of Lea, from Phoenixville, 

 Pa., Fig. 1181 ; Bathygnathus horealis of Leidy, from Prince Edward Island, 



Dana's manual — 48 



