562 THE BEIDGER EPOCH. 



of its characters remain unknown. The very short cervical vertebra which 

 belongs to it serves to distinguish it from other genera. (See Plate XXX, 

 Fig. 3.) A second specimen {E. furcatus) found near the first may belong 

 to it; it includes a fragmentary cranium, but unfortunately no cervical ver- 

 tebrae. Its introduction into this genus is therefore purely arbitrary. 



The typical species is of large proportions, only second in size to the 

 Loxolophodon cornutus. 



EOBASILEUS PRESSICOENIS Cope. 



Loxolophodon pressicornis Cope. Proceed. Amer. Philos. Soc, 1872, p. 580 (published August 19). Loc 

 cit., p. 488 (August 22). L'obasileus cornutus Cope, 1. c, p. 485 (August 20), not Loxolophodon 

 cornutus Cope, 1. c, August 19. Eoiasileus pressicornis Cope, Annual Report U. S. Geol. Snrv. 

 Terrs., 1872 (1873), p. 575, portion. 



Plate XXX, figs. 1-5 ; Plate xxxi. 



The typical specimen embraces cervical, dorsal, and lumbar vertebrae, 

 ulna, both femora and tibiae, astragalus, navicular, &c., and large pai'ts of 

 the scapulae and pelvis. 



The scapula, in its proximal portions, differs in little fi'om that of Loxo- 

 lopliodon cornutus, besides its inferior size. The coracoid is a compressed 

 tubercle inclosing a groove with the glenoid cavity. 



M. 



Diameter of glenoid cavity (longitudinal) 168 



Diameter of glenoid cavity (transverse) 098 



The OS pubis displays a strong pectineal rugosity, commencing near 

 the acetabulum. 



M. 



Long diameter of acetabulum 143 



Length of common public suture 108 



Diameter of pubis, near acetabulum 052- 



The femur is nearly as long as that of Loxolophodon cornutus, but is 

 more slender, and has a relatively smaller head. It is flattened fore and 

 aft, and the great trochanter is much expanded and with a shallow con- 

 cavity on the posterior face. There is a marked concavity on the posterior 

 face of the shaft above the condyles. There is a rudiment of the little 

 trochanter. The tibia is scarcely three-fourths the length of the femur, and 

 has a rather contracted shaft, which is in section rounded triangular, one 

 angle presenting forwards. There is no spine except a rudiment in the 

 swollen upper portion of the anterior ridge. The ai'ticular surfaces are 



