140 ANNALS NEW YORK ACADEMY OF SCIENCES 



From the Mori4son formation near Sheep Creek, Wyoming. Char- 

 acteristic parts of the skeleton of a young individual are known. 



Haplocanthosaurus priscus Hatcher 



liaplocanthus priscus Hatcher, A New Sauropod Dinosaur from the 

 Jurassic of Colorado. Biol. Soc. Wash., Proc, vol. xvi, p. 1, 1903. 



Haplocanthosaurus priscus Hatcher, A New Name for the Dinosaur 

 Haplocanthus. Biol. Soc. Wash., Proc, vol. xvi, p. 100, 1903. 



From the middle beds of the Morrison formation near Caiion City, 

 Colorado. A considerable part of the skeleton is loiown. The form is 

 the most primitive of the American Sauropoda (along with H. utter- 

 hack'i) . 



Brachiosaurus altithorax Riggs 



IJrachiosaurus altithorax Riggs, Brachiosaurus altithorax, the Tjargest 

 Known Dinosaur. Amer. Journ. Sci., 4th ser., vol. xv, p. 299, 1903. 



From the McElmo beds in the G-rand River Valley, near Fruita, Colo- 

 rado. This is a remarkable form in which the humerus is longer than 

 the femur. It is represented by several species in German East Africa. 

 The present species is known from characteristic parts of the skeleton. 



Haplocanthosaurus utterbacki Ilatcher 



Haplocanthosaurus utterhacki Hatcher, Osteology of Haplocantho- 

 saurus, with Description of a New Species, and Remarks on the Probable 

 Habits of the Sauropoda and the Age and Origin of the Atlantosaurus 

 beds. Carn. Mus. Mem., vol. ii, p. 27, 1903. 



From the middle beds of the Morrison formation near Caiion City, 

 Colorado. It is larger than H. priscus, and is known from characteristic 

 parts of the skeleton. 



Apatosaurus louisse Holland 



Apatosaurus louiscB Holland, A New Species of Apatosaurus. Cam. 

 Mus. Ann., vol. x, p. 143, 1915. 



A large and well characterized form from the Morrison formation near 

 Jensen, Utah. 



THEKOPODA 



Dryptosaurus trihedrodon (Cope) 



Loelaps trihedrodon Cope, U. S. Geol. and Geog. Surv. Terr., vol. iii, 

 art. xxxiii, p. 805, 1877. 



