334 



Notice of New Dinosauria. 



Morosaurus agilis, sp. nov. 



A second new species, which apparently belongs to the same 

 genus, is represented by the posterior half of the skull, the 

 anterior cervical vertebrae, and other parts of the skeleton. 

 This, animal was in direct contrast with the one last described, 

 the skull and skeleton being especially light and delicate in 

 structure for one of the Sauropoda. It was also much smaller 

 in size, being the most diminutive known member of the 

 genus, probably not more than fifteen feet in length. 



The figure below represents the back of the skull with the 

 atlas attached, and the postoccipital bones in place. The axis 

 and third cervical were also found in position. These will 

 serve to distinguish the present species from the others of the 

 genus, as they are proportionally much longer, and of lighter 

 structure. 



Fig. 3. 



Figure 3. — Skull of Morosaurus agilis, Marsh ; posterior view, 

 natural size. 



One-half 



The hind feet of the present specimen agree in general 

 structure with those of Iforosaumcs grandis, but differ in 

 having the first digit unusually large and massive in comparison 

 with the others. The third, fourth, and fifth, are especially 

 slender. 



This interesting specimen was found in the Upper Jurassic 

 beds of Colorado, by Mr. M. P. Felch, whose researches have 

 brought to light so many important remains of the Dinosauria. 



Ceratops horridus, sp. nov. 



The strange reptile described by the writer as Ceratops 

 montanus* proves to have been only a subordinate member of, 



*This Journal, vol. xxxvi, p. 477, Dec, 1888. See also p. 327 of the present 

 number. The specimen figured in vol xxxiv, p. 324, may prove to belong to 

 the same °;enus. 



