ISO 
TEllTIAKT VEIiTEBRATA OF THE FATtJM. 
fl:iltciio(l iscliial iubcirosity {isc.t.). The outer surface of the ischium is in almost the 
same plane as the <>luteal surface of the ilium. The })ubis (pu.) is a stout bar of bone 
compr(!sse(l from above downwards. On its anterior border beneath the acetabulum is a 
well-marked pectineal tuberosity towards its inner end it widens out and terminates 
in a flat oval surface by which it unites in symphysis (sym.) with its fellow. Behind 
this surface there runs back to the ischium a thin bar of bone, closing the obturator 
foramen. This bar has a thin shar]) edg'e, and neither it nor the ischium seems to have 
united with the corresponding portion of the opposite os itmominatum. The obturator 
foramen [obt.f.) is an elongated oval. The acetabular ' cup (acet.) is nearly circular in 
outline ; it is deep, its edges being prominent and thickened, ])articularly in front. 
Its border is complete, there being no cotylar notch, which is only represented by a 
j)assage (/‘.) running through the posterior wall of the acetabulum from just above the 
anterior end of the obturator foramen and opening into the posterior end of the pit for 
the ligamerdum teres Q.f.), which is a deep elongated depression at the bottom of the 
acetabulum. This arrangement is also found in a very similar pelvis of Braclujodus 
afrlcanvs from Moghara and in Hippopotamus : this last gxmus, in fact, seems to b(' 
intimately related with these African Anthracotheres, and annectant forms similar 
to Meriicoj'iotaiiuis will jirobably be discovered in the Miocene beds between JMoghara 
and the Wadi Natrun, in the Lower Pliocene deposits of which remains of a primitive 
Hippopotamus have already been found. The dimensions (in centimetres) of this 
specimen are : — 
Total length of os inuoiuinatum 37’2 
„ ilium from centre of acetabulum 20‘4 
„ ischium from centre of acetabulum .... 17'0 
Width of peduncle of ilium 6 
„ crista ilii IGA 
Diameter of acetabulum 5-2 
Length of obtui’ator foramen 9'4 
Width of pubic bar on inner side of obturator foramen ... 1 •.'i 
Length of symphysial surface of pubis 5'5 
Depth of symphysial surface of jiubis 3 
M. 9242. Plaster cast of the al»ove specimen. Made in the British Museum. 
C. 9224. Portion of left os innominatum, wanting part of front of ilium and the pubis. 
M. 8866. Portion of left os innominatum. Presented hij the Bgpptian Government, 1901. 
M. 8864a. Complete left tibia. The most notable character of this bone is the slenderness of its 
distal |)ortion compared with the heaviness of its upper end. The outer facet for the 
femur is concave from side to side and strongly convex from before backwards ; its 
inner edge forms a rounded ridge separated by a groove from the raised outer edge ol 
the inner facet, the two together forming a bifid intercondylar prondnence. The inner 
facet is concave from side to .side and nearly flat from bcd'ore backwards. In front of the 
articular surface the u])per end of the large cnemial crest forms a broad tlattened surface. 
The upper ])ortion of the shaft is trihedi'al ; its antero-external side is deeply concave, 
the jiosterior slightly so; this lath'r face is overhung by the jiosterior border of tlu' 
proximal articulation. Tin* cnemial crest disa|)pears about hallway down the shall, 
