SIXOl’A ETIIIOL’ICA. 
Zoo 
blade and a small talon. 'I'lu' liigh anterior portion consists of an antero-intci nal and 
a postero-external cnsp, wliicli tend to form a cutting-blade, and a small })ostero-internaI 
cusp. The tabm in the typical species is more or less basin-sha])ed. 
It is with considerable hesitation that the fragment of a mandible described below 
has been referrc'd to a member of this genus, wdiich has hitherto been almost, if not 
quite, confined to North America, 'flie European genera and /Voy/eerm 
are very closely allied to Sinopa^ Imt tlie present specimen difhu’S from the mandibles of 
species referred to them both in being considerably larger and in possessing more 
massive molai>, the cusps of which are neither so high nor so ])ointed. lliitimeyer * 
has already referred a small Creodont fi om the Eocene of Egerkingen to Stijpolophas 
[Sinopa), distiiniiiishing it from Proviverra and Cpnohijce.iiodon on these same grounds, 
and his specimen must be very similar to that now described and made the type of a 
new species. 
Sinopa etMopica, sp. nov. 
[Plate XIX. tigs. G, 6 A.] 
Type Specimen — Portion of left ramus of mandible with pm. 4 and m. 1-3 in situ 
(PI. XIX. figs. 6, 6 a) : Geological Museum, Cairo. 
This species is about the same size as Sinopa agilis (Marsh), but differs from it, 
and apparently from the other American species also, in the relatively smaller size of 
the last premolar and fir^t molar compared with the last molar. It also differs from the 
typical members of the genus in having a trenchant talon, the cutting-edge of which 
is situated rather towards the outer side of the tooth ; in the other species the talon is 
basin-shaped. This difference suggests that when more is known of its structure, this 
species may requiri' to be placed in a nevv genus. 
Form. & Log. — Fluvio-marine beds (U[)per Eocene): north of Birket-el-Qurun. 
C. 10193. Portion of the left ranuis of the mandible with the somewhat broken molars and fourth 
premolar. Type specimen figured on PI. XIX. figs, fi, 6 a. 
The 1 amus, so far as preserved, is of nearly the same depth throughout ; posteriorly 
it is broken away about 1’5 cm. behind the last molar ; there seems to have been a well- 
marked masseteric fossa. The last premolar (p»i. 4) consists of a large, somewhat, 
compressed, main cone, v/ith small anterior and posterior basal cusps, the posterior one 
being the smaller and forming a short cutting-talon ; the basal length of this tooth is a 
little greater than that of m. 1. The molars increase in .size from before backwards. 
Each consists of a high tricuspid anterior portion and a talon. In all the teeth the end,s 
of the main cusps have been broken away, but it can he seen that the postero-external 
cusp was the largest and with the antero-internal formed an imperfect cutting-blade ; 
the postero-internal cusp is small and intimately connected with the inner face of the 
* Abhandl. Schweiz. Pal. Ge.s. vol. xviii. (1S91) p. 104, pi. vii. figs. 10, 11. 
2 II 
