the (?) Pliocene of British East Africa. 415 
mandible above described, but in another specimen it is seen 
to be rounded, with a slightly inflexed margin. The dental 
foramen is in the position usual in the family. 
Lower Molars (P\. XV. figs. 4 & 5).—In the figured man- 
dible the incisors and canines are represented by their broken 
bases only. The canines (c.) are oval in section and are 
small, showing that the individual was a female. The ante- 
rior premolar (pmz;) is likewise small, but its anterior face is 
enlarged and produced downwards and forwards to receive 
the bite of the posterior edge of the upper canine, as is usual 
in this group. The remaining teeth, though proportionately 
larger, are similar to those of Theropithecus, the inter- 
mediate cusps being well developed and there being an even 
larger talon in m3. This talon consists of a large cusp and a 
raised border with well-marked crenulations connecting it 
with the postero-internal cusp; in Papio and Macacus the 
talon is proportionately much smaller. 
The dimensions of the mandible of the type-specimen (in 
millimetres) are :— 
Per SVAN YSIS ty. = tant ci Ad ids Gt tole Fietan ev, tie eh ens « AB 
Length from incisive border to back of condyle ........ 13 
Width of ascending ramus at condyle ................ 48 
Depth of horizontal ramus beneath m,...............- 5 
Lagat Oe ae CIE CASE dl 
ed ” ” ” 
The dimensions of the teeth (in millimetres) are :— 
Length, Width. 
High UA Dea toner hs 10 7 
VELL ho aio acc One 9 8 
PI AS aS eee ae qu! e 
EA a eR Ooh le ? 
Teh de, veep es 20 DE 
Thecollection also includes a pairof very large lower canines 
(Pl. XV. fig. 6), presumably of an old male. That of the right 
side has lost most of its crown, but the left is nearly complete, 
only the tip of the root being lost. The root is very massive 
and oval in section, the long axis being antero-posterior; on 
the inner face there is a slight longitudinal groove. The 
crown is greatly worn on its posterior face, tlie surface of wear 
terminating below in a sharp oblique step. This condition 
is almost exactly similar to that seen in an old male Thero- 
pithecus, but here the tooth as a whole is much more slender. 
The length of the left tooth (so far as preserved) is about 
46 mm., the width of its root from before backwards 17 mm., 
and that from side to side 11 mm. 
28* 
