376 



University of California Publications in Geology [Vol. 12 



astragali. This is marked in the 

 two that are nearest of height, nos. 

 23382 and 23383 (figs. 94a and 94& ) , 

 the first differing from the second 

 in : ( 1 ) the transverse narrowness 

 of the dorsal trochlea through 

 thinness of the outer condyle and 

 narrowness of the inner groove ; 

 and (2) the prominence of the 

 outer condyle of the ventral troch- 

 lea in respect to the inner condyle. 



PKOCAMELUS(?) FORMS WITH 

 SLENDER LIMBS 



Material. — A small second phalanx, 

 no. 23385 (pi. 48, fig. 3); the trochlea of 

 two first phalanges, nos. 23386, 23773 

 (pi. 48, figs. 5a, 5b); the proximal por- 

 tion of two metapodials, nos. 23480 and 

 23479 (figs. 93b, 93c) ; the distal end of 

 a humerus, no. 24284 (fig. 92d) ; an ulna- 

 radial section, no. 23482 (pi. 48, fig. 9); 

 a scaphoid, no. 24035 (pi. 48, fig. la) ; 

 and scaphoid no. 23399 (pi. 48, fig. 7b). 

 Various localities, all specimens in Univ. 

 Calif. Coll. Vert. Pal. 



Discussion. — The trochlea of two 

 slender first phalanges, nos. 23386 

 and 23773 (pi. 48, fig.s. 5a^56) are 

 considerably heavier than that of 

 phalanx no. 23387 (pi. 48. figs. 2a- 

 2h) of the following section. The 

 two fragments are believed to rep- 

 resent the moderate sized species 

 further suggested by the other 

 material of this .section. Specimen 

 no. 23386 is very similar and but 

 slightly larger than one from the 

 Coalinga Etchegoin (no. 21243) in 

 the Univ. Calif. Coll. Vert. Pal. 



Fig. 91. Procamelus?, sp. Cannon 

 bone, no. 23422, anterior and lateral 

 views, X %. Eden beds, California. 



