PAL^OMASTODON MINOR.— PHIOMIA. 169 



M. 8479 b. Right ramus o£ mandible, imperfect at both ends. Pm. 3, pm. 4, m. 1-3 are present, m. 3 

 as an uncut germ ; pm. i-m. 2 are somewhat imperfect on the inner side. Type 

 specimen described in Geol. Mag. [5] vol. i. (1904) p. 115. Figured on PI. XIV. 

 figs. 1, 1 A ; also the second and third molars in text-fig. 50, D. The dimensions (in 

 centimetres) of the teeth are : — 



Length. Width. 



pm.3 2-8 1-6 



pm.4: 2-6 2 app. 



m. 1 3-2 2-1 app. 



TO. 2 4-5 2-9 app. 



TO. 3 4-8 2-9 



The lengths (in centimetres) of the teeth compared with those of the other species 

 are shown in the following table : — 



P. minor. P. parvus. P. wintoni. P. beadnelli. 



pm. 3 .... T 2-8 3-5 app. 3 4-1 app. 



pm.4: 2-6 3-5 app. 3-5 4-8 



TO.l 3-2 3-8 4-3 4-8 



TO. 2 4-.5 4-5 5-7 6-5 



TO. 3 4-8 4-6 7-3 7-8 



Length of molar series 12-6 13 17'2 19*4 



„ premolar series .... 6-7 7 app. 6 3 9*2 app. 



„ molar and premolar series . 18 19-7 23 28-5 



Presented by W. E. de Winton, Esq., 1903. 



The following specimens may be referred provisionally to this species : — 



C. 8110. Two trilophodont upper molars. These teeth are of the size and type that might be 

 expected in the upper juw of this species. Length 4'5 cm. ; width 3"1 cm. 



M. 8860. Atlas vertebra. 



Width of articulation for skull 12-8 cm. 



axis 10 „ 



Genus PHIOMIA, Andrews & Beadnell. 



[A Preliminary Note on some new Mammals Prom the Upper Eocene of Egypt, 

 pp. 1-5, figs. 1, 2 (Survey Department, Cairo, 1902). J 



Known only from an imperfect mandibular ramus, in which the single spatulate 

 incisor is serrated on its outer margin. 



It was originally suggested that this mandible might represent a very aberrant 

 type of Creodont, but this determination is certainly wrong. Schlosser * has 

 suggested that the specimen in question is the anterior portion of the mandible of 

 a very young PalcBomastodon, a supposition which not impossibly may be correct, 

 though since this is by no means certain it seems preferable to keep the genus 

 Phiomia for the present and place it in its present position. 



* Neues Jahrb. f. Min. Geol. u. Palaeont. 1905, vol. i. pt. i. (Eeferate) p. 1.57- 



z 



