April 22, 1898.] 



SCIENCR 



557 



the ground. This remarkable lowering of 

 the trunk is chiefly caused by the great i-e- 

 duction of the fore arm, fore leg and 

 metapodials. The humerus and femur are 

 respectively only 90 and 110 mm. shorter 

 than in R. unicornis, while the radius and 

 tibia (typically shorter elements) are re- 

 spectively 140 and 130 mm. shorter, and 

 the metacarpals and metatarsals are re- 

 spectively 90 and 950 mm. shorter. This 

 limb reduction is very striking. At the 

 same time the abdominal girth exceeds that 

 of -fi. itnicornia, justifying Cope's conclusion 

 that this animal had rather the proportions 

 ■ of the hippopotamus than of the rhinoceros. 

 It will be recalled that R. unicornis has a 

 lower abdominal line than R. sondaicus or 

 jR. sumatrensis, or than either of the African 

 rhinoceroses. T. fossiger, therefore, had a 

 totally different external appearance from 

 any existing form. 



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. brachypus and R. 

 aurelianensis. 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.* 



Henry F. Osborn. 



A NATURAL BRIDGE IN UTAH. 

 The remarkable natural bridge illustrated 

 in this article has, so far as I know, never 

 been called attention to before, and is, 

 therefore, entitled to rank as a new discov- 

 ery among the curiosities of nature. It is 

 an object rivaling the celebrated natura 



It maj' be briefly characterized as a brach- 

 ycephalic, extremely short-limbed rhinoc- 

 eros, partly aquatic in its habits, with a 

 very large brain and no diploe of the skull. 

 It parallels the African rhinoceroses S. 

 ■simus and R. bicornis, in the form of the 

 humerus, femur and atlas, and in the ter- 

 minal position of the nasal horn. The oc- 

 ciput, however, is widely different from 

 that of the African rhinoceroses, as well as 

 of R. sumatrensis, resembling rather that of 



bridge of Virginia in magnitude and even 

 exceeding that classic in interest when one 

 considers its probable origin. 



The view was taken in southeastern Utah 

 not far from Moab, on the Grand Eiver, in 

 the midst of the great arid region lying 

 west of the Kocky Mountains and some 

 fifty miles from any railway. It was not 

 my good fortune to be able to visit the lo- 



* Bulletin American Museum of Natural History, 

 March 18, 1898. 



