1 898. J Osborn, Skeleton of Teleoceras fossiger. eg 



8393) being smaller and less rugose, with less prominent sagittal 

 crests, and decidedly smaller nasals, as shown in PI. IVa. In old 

 females the nasals acquire a slightly rugose surface, and probably 

 bore a small horn. In the males (Decatur Co., Kansas, Nos. 

 8385, 8396 ; Republican River, Nebraska, No. 8420) the nasals 

 become greatly thickened at the extremities (PI. IVa), forming a 

 vertically compressed plate, which undoubtedly bore a consider- 

 able horn. Differences in size are observed in skulls from various 

 localities, those from Decatur Co., Kansas, and from Nebraska, 

 being larger than those from the Phillips Co. quarry, which are 

 probably due to differences of geological level, the species run- 

 ning into a larger and more robust type before its extermination. 



Growth-changes in the limbs are especially observed in the 

 close fusion of the fibula with the tibia, and of the remarkable 

 arching over of the sacrum by the superior borders of the ilium ; 

 this whole area above the sacrum forming a solid plate. 



Conclusions. 



T. fossiger may be briefly characterized as a brachycephalic, 

 extremely short-limbed Rhinoceros, partly aquatic in its habits, 

 with a very large brain and no diploe of the skull.' It parallels 

 the African Rhinoceroses R. simus and R. bicornis^ in the form of 

 the humerus, femur and atlas, and in the terminal position of the 

 nasal horn. The occiput, hov/ever, is widely different from that 

 of the African Rhinoceroses, as well as of R. sumatrensis, resem- 

 bling rather that of R. unicornis, although less pitched forward. 

 The limbs are much shorter than in any living type, and, 

 as pointed out by Pavlow,^ at once recall those of R. brachy- 

 pus and R. aureliatiensis. A further comparison of T. fossiger 

 strengthens the resemblance to the latter form. The proportions 

 of the skull, limbs and metapodials are very similar. In both the 

 cnemial crest of the tibia is double ; the secondary folds of the 

 superior molars are similar, as well as the general form of the 

 skull. Further details will be given in the writer's forthcoming 

 Memoir on the Extinct Rhinoceroses. 



' See Scott and Osborn, op cit.. i8qo, p 93. 



2 ■ Les Rhinocerida: de la Russie et le developpement des Rhinoceridse en general,' Bull. d. 

 la Soc. d. Nat. d. Moscou, 1802. 



