302 THE OSTEOLOGY OF ELOTHERIUM. 
Measurem ents, 
Scapula, glenoid cavity, transverse CiaMeter..........ccsccccesseceseeneceecceeecanccessececeesecssesseses -050 
Pimerus, Lem eth <-ee-- eee em nine nen ennnieccaneisse ste cieciens\asieseerisiosensriss>ssaseass-er/ssensenseaseee saan. rssnns .405 
Humerus, width of proximal end,.........06. consoscresssereerssecssecseeeseeeecssssevsreeseesteveresanresers 132 
Humerus, thickness of proximal end....-...-:.-secsesseeeeeeeeeeeeeeeecee ee .128* 
Etumeruss wiadtihvordistaltemdccs-ceateeessccrsecceesscesciccceneasessecheeskerneeeerenteseee cee rerceeeeesecee .095 
TREGITS, JIGME H Nooo ocoons00an sno noHSoDSADNoTOMADSGOdNODD soqDoOONoECHSgOFODSEC nocoD DHS SACHCOoDONboBHOSHOSODSHODHSONNSCO .300 
DEH USS yy Le fy pox ena ea Cl ep ta ett ee ele ele tel le le ele lee leet see se alee eee eee eee 074 
Radaus; widbhuot Gistalliendsaneccscscscssnc sce sece casement siseseseiteaeiec seateneecbenilsshiveasisndseessce=ncteieecce .062 
UME, TSE Mescrscae ceeednses2c902009d000 BooNoD oaaSoaDdsSCEDDTONOGNA DLioBeOSOUNGoOSNOSOSHoDOOCUS OCS SBOoOASoooRSOBOCRON 443 
Ulna, length of olecranon fr. CoronOid ProCeSs....-.--.--.eseceeceeseccnecceccereeentsasscecenseeceessseners 103 
Wika, spadlidn Ge Chie iElscc6on: sonecnacond copoonoGaBEC DOG ADCoOATAgSDoCoOHOOONUNEHSosaDEDSeONS SoeeencSoEEeNOoIOCNCON .037 
VII. Tse Manus (Pl. XVII, Fig. 11). 
co} 
The principal facts of the structure of the fore foot have already been determined by 
Kowalevsky, but the material now at command permits a more complete account to be 
given. Certain differences also which obtain between the European and American repre- 
sentatives of the genus should not be passed over without mention. 
The carpus of Elotheriwm is a curious one in many ways, and while modified to suit 
the didactyl condition of the foot, by the reduction of the lateral and enlargement of 
the median elements, it has yet retained many of its primitive characteristics. 
The scaphoid is high and thick in the dorso-palmar direction, but very narrow trans- 
versely. The dorsal and internal (7. ¢., radial) surfaces of the bone are very rugose, and 
on the palmar border, which is the narrowest part of the scaphoid, is a blunt and massive 
mammillary process. The articuiar surface for the radius is of unusual shape. It is 
divided into two parts, an antero-external and a postero-internal ; the latter is much the 
larger and is saddle-shaped, conyex transversely and concave in the dorso-palmar 
direction, while the former is convex and descends steeply toward the ulnar side. These 
two parts of the articular surface are continuous, but they meet at nearly a right angle, 
and their junction forms a ridge, which is the highest point of the scaphoid. On the 
ulnar side are three facets for the lunar ; the largest one is proximal and dorsal, and is 
continuous with the surface for the radius, which it meets at almost a right angle ; this 
facet is very oblique and presents distally as well as laterally, the scaphoid here forming 
a projection which extends over the lunar. The second lunar facet is dorsal and distal in 
position ; it is small, nearly plane, and not very distinctly separated from the facet for 
the magnum. The third lunar facet is distal and palmar, and is placed upon the ulnar side 
of the mammillary process already mentioned ; it is of oval shape and nearly flat. The 
contact between the scaphoid and the lunar is confined to these three points, and as the 
* Somewhat reduced by crushing, 
