96 BULLETIN OF THE 



Hind limb. — There is a complete left innominate bone, which gives all the 

 characters of the pelvis. The upper surface of the ilium, unlike that of Cerato- 

 rliiinis, is nearly flat. The supra-iliac border is evenly arched, and, as the 

 ischial and acetabular borders are of approximately the same length, the ilium 

 is unusually symmetrical. The ischium and pubis are in a plane perpendicular 

 to that of the ilium ; the pubic symphysis is short ; the obturator foramen is 

 an elongate oval. The tuber-ischii is not very prominent. The border extend- 

 ing from the tuber to the symphysis is evenly rounded. 



The femur is relatively longer and more slender than the humerus, having 

 the form and proportions observed in Geratorhinus. The great trochanter stands 

 out widely ; below this the shaft is of a broad flattened section ; the lesser tro- 

 chanter presents a long low ridge ; the third trochanter is only half as promi- 

 nent as in the recent rhinoceros, and is not recurved. The tibia is characterized 

 by a marked asymmetry of the tuberosity ; the internal malleolus is not promi- 

 nent; the popliteal space is deeply excavated; the astragalar facets are shallow. 

 The fibula is of the same proportions as in the recent rhinoceros. 



The tarsus is unusually short and spreading. The astragal o-tibial facet is 

 flattened laterally, and shows little fore and aft play ; the ectal and sustentacu- 

 lar facets are either confluent or slightly separate; the inferior is distinct and 

 separate ; the cuboidal facet is extremely broad. The cuboid is shallow, with 

 subequal calcaneal and astragalar facets; posteriorly it articulates with both 

 the navicular and ectocuneiform, anteriorly with the latter only ; it has a very 

 deep posterior hook. The presence of the entocuneiform is indicated by the 

 articular facets for it. The mesocuneiform is narrow and deep. The ectocu- 

 neiform is very broad ; this bone and the navicular have the same proportions 

 as in the rhinoceros. The middle digit is much the largest of the three, and 

 Mts. III. has a considerable cuboidal facet. 



The following measurements are made from specimens which belong to dif- 

 ferent individuals, a, 6, c, etc.; they therefore cannot be used in estimating the 

 exact proportions of the different parts. The proportions have, however, been 

 very carefully determined in the accompanying restoration of the skeleton. 



Measurements. 

 Skull. 



m. 



Spec. s. Total length, sagittal crest to end of nasals 490 



" Breadth, outside zygomatic arches 360 



Depth, penultimate molar to top of cranium 235 



" Occiput, diameter of, transverse, .268 m.; vertical 198 



" From occiput to anterior end of orbit 340 



" Antero-posterior, diameter molar-premolar series (pm. 115 m., 



m. 150 m.) 265 



" Diameter first molar, antero-posterior .057 m., transverse . . .070 

 " second " " .068 " ... .070 



" third « " .058 " ... .052 



