214 



DIIsrOCERATA. 



'i lie teeth preserved are but little worn, indicating a fnlly adult, but 

 not old, animal. 



Another specimen (number 1533) referred to this s])ecies is quite 

 unlike any other in the collection in the t"oi-m of the nasal bones so far as 

 preserved, but, unfortunately, the specimen is considerably eroded. The 

 snout, instead of tapering-, expands forward, and presents on each side a 

 broadly i-ounded, horizontal ])rotuberance, scarcely- I'ising at all above the 

 general level of the nasal bones. They, also, project forward, far beyond 

 the end of those bones, which were thoroughly consolidated, and directed 

 somewhat downward, underneath the broad shelving protuberances. 



The left maxillary protuberance preserved with this specimen is of 

 large size, and flattened on its outer side. 



This species, with Tinoceras rnnnifitni, forms a distinct sub-genus of 

 Tii/ocera.s, ^\hich may be called Phitoccias. 



The type of this species (numl)er 1242) was obtained in September, 

 1873, by Mr. Ij. Lamotte and the author, near S]janish John's Meadow, 

 Wyoming. 



The remains of this specimen consist of portions of the skull, and teeth. 



A second specimen (number 1533), apparently a very old individual 

 of the same species,- -was found in May, 1875, by Messrs. S. Smith and 

 S. Pearson, at Haystack Mountain, Wyoming. 



This specimen consists of portions of the skull. The extremity of 

 the nasal bones is figured above. 



The geohigical horizon of these specimens is in the Bridger beds. 



The known remains of this species are preserved in Yale College 

 Museum. 



Tinoceras loiigiceps, Marsh. 



Woodcuts: 38, p. 37; 48, p. 43; and 191, 19-2, below. 



Fic. 19->. 



Figure 191. — Loft maxillary pi-utiilifiMnci' of Tinoceras longiceps, Marsh (No. 1256, female); side view. 

 Figure 192. — Left parietal protiiberanee of same skull; side view. 



The dotted line shows the outline of the cavilies (a and b) at the base of each specimen. 

 Botii figures are one-lourth natural size. 



