SAGHATHEEIUM MAGNUM.— SAGHATHERIUM MAJUS. 91 



M. 8868. Portion o£ right ramus o£ mandible with the molars and three posterior premolars. 



Figured PI. VI. figs. 4, 4 a. The dimensions of the specimen (in centimetres) are : 



length of m. 3, 1-9 ; m. 2, 1-1 ; m. 1, -95 ; pm. 4, -7 ; pm. 3, '7 ; pm. 2, "55. 

 C. 8057. Portion of right ramus of mandible with the premolars {pm. 2, and pm. 3 incomplete), 



m.. 1, m. 2, and part of m. 3. Length of premolar series 2'6 cm. Length of m. 2, 1'2 cm. ; 



m. 1, "9 cm. ; pm. 4, '8 cm. Depth of mandibular ramus beneath front of m. 3, 4 cm. 

 C. 8106. Portion of a mandibular ramus of an old individual : m. 3 has a large crescentic talon 



and is much worn. The lengths (in centimetres) of the teeth are: m. 3, 1"8 ; m. 2, 1'2 ; 



m. 1, 1-9 ; pm. 4, '8. 



Saghatherium majus, sp. nov. 



■ [Plate VI. fig. 5.j 



Type Specimen. — Portion of right maxilla containing the canine, the first premolar, 

 and the greater part of the second premolar ; British Museum. 



An imperfectly known species provisionally referred to this genus, intermediate in 

 size between Saghatherium magnum and Megalohyrax minor. Length of c. + pm. 1, 2, 

 4 cm. (in S. magnum, 2'2 cm.); oi pm. 1, 2, 2"7 cm. (in M. minor, 3 cm.). Teeth 

 considerably narrower than in M. minor, owing to the slight development of the inner 

 cusp and of the postero-internal shelf. 



Form. & Log. — Fluvio-marine beds (Upper Eocene) : north of Birket-el-Qurun. 



M. 8434. Anterior portion of right maxilla with the canine^ first premolar, and the greater part of 

 the second premolar. Type specimen. The canine is almost unworn ; it consists of a 

 fairly high sharp main cusp, and a small anterior cusp, from which the cingulum, 

 which is strongly developed, runs round the inner face of the tooth to its posterior 

 angle. The outer half of pm. 1 is similar, but here there is a strongly developed 

 antero-internal cusp and a postero-internal heel. Pm. 2 is incomplete, but it can be 

 seen that it had a large antero-internal cusp and a postero-internal cusp on the 

 cingulum. The lengths of the three teeth (in centimetres) are : c. 1"3 ; pm. 1, 1'4 ; 

 pm. 2, 1'4. Total length of the three, 4 cm. 



C. 10010. Eight upper m. 2, probably of this species, figured on PI. VI. fig. 5. This molar is 

 very hke that of Megalohyrax minor, but is smaller and has the outer main cusps 

 forming slightly greater projections on the ectoloph. The length of the ectoloph is 

 1"85 cm., in M. minor 2' 6 cm., and in Saghatherium magnum 1*4 cm., so that there can 

 be no doubt that this, like the other specimen, indicates the existence of another 

 species intermediate in size between S. magnum and M. minor, and to this the name 

 Saghatherium majus may also be applied. Length 1'9 cm., width 1*9 cm. 



M. 8453. Plaster cast of the above specimen. Made in the British Museum. 



M. 8879. Posterior portion of right ramus of mandible with the greatly worn m. 2 and m. 3 in situ. 



The length of m. 2 is 1'3 cm., that of m. 3, 1'7 cm. ; the depth of the ramus beneath 



m. 3 is 4 cm. 



k2 



