TEirriARr YERTEBRATA of the FATtM. 
S8 
nomenclature. There is also a larger tubercle at the posterior end of the anterior V, 
which likewise projects backwards ; this is the metastylid. There is a slightly 
developed cingulum on the tw'o posterior premolars. 
The lower molars are very similar to the premolars, but the column developed at the 
inner end of the hinder arm of the posterior V (the entoconid) is larger, as also is the 
metastylid. The third molar has a large talon wdth a sharp raised edge surrounding a 
(h'ep fossa ; this is supported by a large root. In the recent Hyracoids the talon has 
disappeared or is represented by a mere rudiment, but the root seems to be always 
present though of very small size, its function having been lost. 
C. 8635. Right and left inaxillje and portions of skull. The type described and figured in ‘A 
Preliminary Note on some new Mammals from the Upi)er Eocene of Egypt,’ p. 5, 
fig. 4; also on PI. VII. figs. 4, 5. The dimensions (in centimetres) of these specimens 
are : — 
AVidtli of skull-roof at the supraorbital processes 56'0 
Length of tootli-series (molars, premolars, and canine) . . . 6'2 
„ molar and premolar series 5‘7 
,, molar series 3’4 
„ premolar series 2‘5 
Greatest width of 3 1’4 
„ length „ 1-5 
M. 8878. Plaster casts of the above specimens. Made in the British Museum. 
C. 10057. Two right ujiper molars, m. 2 and m. .3, the latter only slightly worn. Figured on 
PI. VI. iig. 6. The width of m. 3 is 1'2 cm., its length P4 cm. 
M. 9221. Plaster cast of the above specimen. Made in the British Museum. 
C. 8631. Fragment of maxilla with rn. 1, in. 2, and part of m. 3. 
M. 8869. Three left upper molars. The width of m. 3 is IT cm., its length 1-3 cm.; length of molar 
series 2'9 cm. Presented by the Eyyptian Goi'ermnent, 1904. 
C. 8819. Portion of the base of a skull probably referable to this species or to S. maynum. This 
specimen includes the basis cranii, together with the glenoid region of the squamosal ; 
the tympanic has been lost. 
C. 8106 b. Right ramus of mandible with molars and premolars. The lengths of the teeth (in 
millimetres) in this specimen are: in. 3, 14 ; in. 2, 10 ; in. 1, 8 ; pin. 4, 7 ; pin. 3, G ; pm. 2, G ; 
pm. 1, 5. 
C. 8106 a. Portion of left ramus of mandible withpun 4 and in. 1-3. The lengths of these teeth (in 
millimetres) are : m, 3, 15 ; in. 2, 10 ; m. 1, 9 ; pm. 4, 7. 
M. 8868a, Right ramus of mandible with m. 1-3 and pm. 2-4. The lengths of these teeth (in 
millimetres) are : in. 3, 15 ; in, 2, 11 ; m. 1, 9 ; pm. 4, 7 ; pm. 3, G ; pm. 2, 5. 
Presented by the Egyptian Government, 1904. 
M, 8399, Left ramus of mandible of a slightly smaller individual with m. 1-3 and pm. 4. 
Presented by the Eyyptian Government, 1902, 
