162 
TERTIAET VERTEBRATA OE THE EATtJM. 
The dimensions (in centimetres) of some of the above specimens are : — 
C. 9094. 
Wicltli between outer edges of articulation 
for skull 15-5 
of siu-faces for axis 13-5 
to ends of transverse processes . . 25-7 
C. 9074. 
C. 82G1. 
C. 831.'). 
M.8856 a. 
M. 885Gi. 
15-5 
16 
15-7 
15-3 
15 
12 
13 
12 
12 
12 
25 app. 
26-4 
25-4 
C. 8079. Nearly complete axis vertebra. This specimen shows the large peg-like, somewhat 
compressed odontoid with distinct ventral facet, the strong hypapophysial ridge, the 
very high neural arch with the neural spine deeply hollowed out posteriorly by a deep 
fossa for the attachment of ligaments. 
M. 9123. Atlas vertebra similar to last, but less nearly complete. 
M. 8857. Imperfect centrum of smaller axis. Presented hy the Egyptian Government, 1901. 
The dimensions (in centimetres) of the above axis vertebrae are : — 
0. 8079. 
M. 9123. 
M. 8857. 
licngth of centrum with odontoid 
. 12-5 
12 app. 
9-5 
AVidth of surface for atlas .... 
11 app. 
11 app. 
10 
„ posterior face of centrum . 
7‘5 app. 
8 
Height to top of neural spine . . 
. 14 + 
15-5 
„ of neural canal 
3 
3'5 app. 
M. 8513. Right astragalus. Figured in text-fig. 52. The dimensions (in centimetres) are ; — 
Width of tibial surface, including facet for internal malleolus .... 8 
,, calcaneal surfaces 8 
„ navicular surface 7‘7 
Presented hy IF. E. de Winton, Esq., 1903. 
C. 8355. Portion of left astragalus. 
C. 10063. Imperfect left calcaneum. 
PalSBOmastodoil parvus, Andrews. 
[Text-figs. 50 C, 55-59.] 
1905. Palccomastodon parvus, C. W. Andrews, Geol. Mag. [5] vol. ii. p. 5G2. 
Type Specimen . — Imperfect right ramus of mandible, with pm. 3-4 and m. 1-3 in 
mtn (text-fig. 55) ; British Museum. 
This species is distinguished from P. headnelli by its small size, but at the same 
time it approaches that species very nearly in the comparative simplicity of its teeth, 
])articularly in the form of 7n. 3, and in having the posterior end of the mandibular 
symphysis some distance in advance of the anterior ])remolar, a character whicli at 
once distinguishes it from P. wintoni. Tire third molar (text-figs. 50 C, 55) consists of 
two transverse ridges, each composed of two tubercles, and a small third ridge consisting 
