1890.] NATURAL SCIENCES OF PHILADELPHIA. 183 



Comparative measurements of the teeth of: 



H. ingenuum. H. plicatile. H. princeps. 

 Fore and aft diameter 19mm. 20mm, ' 82mm. 



Transverse do 17nim. 24mm. 31mm. 



The fossil bones from near Archer, Florida, which have been the 

 subjects of former brief communications (Proc. 1884, 118 ; 1885, 32 ; 

 1886, 11 ; 1887, 309) consist in greater part ofthe remains of a species 

 of Rhinoceros, distinguished as E. proterus. It was an animal ap- 

 proximating in size the living li. indicus, but had comparatively 

 short, robust limbs and was probably hornless. The remains 

 consist of teeth and bones, with fragments of others, mostly isolated, 

 of many individuals. Thus as an indication of the latter the collec- 

 tion contains 28 astragali and nearly a hundred complete metapodials. 

 The bones of the feet are remarkable for their short, robust char- 

 acter. Among the fossils are a few bones and teeth of a second 

 species of Rhinoceros, a little larger than the former and with feet 

 of the same proportions as in the recent Indian Rhinoceros. Of this 

 species the collection contains but a single imperfect astragalus. A 

 pair of metacarpals, the second and fourth, though of less breadth 

 than those of R. proterus, approximate double the length. The com- 

 parative measurements of the specimens are as follows : 

 Second metacarpal : R. long! pes. R. proterus. 



Length, in front, at middle . . 157mra. 92mra, 



Breadth of upper extremity . . , 45mm. 50mm. 



Breadth of lower articulation . . 39mm. 40mm. 



Fourth metacarpal : 



Length, in front, at middle . . 144mm. 81mm. 



Breadth of upper extremity . . 40mm. 44mm. 



Breadth of lower articulation . 35mm. 41mm. 



A carpal scaphoid in comparison with one of R. proterus presents 

 the following measurements. 



Extreme breadth .... 84mm. 85mm. 



Extreme height .... 60mm. 40mm. 



A pair of tusks, lower incisors, much worn, which have been about 

 8 inches long, are supposed to belong to R. proterus. They are 

 strongly curved much compressed fore and aft, and measure 

 47mm. wide by 33mm. thick at the base of the crown. Another 

 tusk, about a foot long, is supposed to have belonged to the other 

 species of Rhinoceros. It is less curved and more cylindrical than 

 the former, and at the base of the worn crown is 51mm. wide and 

 45mm, thick. 



For the second species the name of Rhinoceros longipes was 

 proposed. 



May 27. 

 The President, Dr. Joseph Leidy, in the chair. 

 Twenty-eight persons present. 



