AESINOITIIERIUM ZITTELI. 
G9 
C. 8288. Sjniplijsis and front of rami of a young inandildo al)out the same age as last, and 
witli tlie same teeth in situ. The lengths of (lie teeth are : rnm. 3, 2‘S cm. ; mm. 4, 
3’3 cm.; /)). 1, 3'8 cm. The symphysis extends to bcTieath the front of mm. 4 ; its length 
is about 8 cm. 
M. 8822. Fragment of right ramus of mandible with mm. 3 and portions of m?u. 4 in situ ; mm. 2 is 
represented by its broken roots, and in front of it the crown of pm. 1 is just appearing. 
This tooth is placed very obliquely in the jaw, and must gradually rotate into its 
normal position as the growth of the mandible allows it room to do so. 
Presented hy the J^Hgyptian Government, 1904. 
M. 8823. Anterior portion of right ramus of very young individual similar to M. 8822. In this 
also the crown oi pm. 1 is just appearing, and is here placed almost transversely. In 
front of it are the alveoli of the canine and three incisors. Behind is the broken ba.se 
of mm. 2. The symphysis extended back as far as the posterior end of mm. 2, and the 
mental foramen is beneath the anterior column of the same tooth. 
Presented by the Egyptian Government, 1904. 
M. 8410. Left upper molars. 
M. 8825. Nearly unworn upper m. 3. Presented by the Egyptian Government, 1904. 
C. 8942. Upper m. 3 slightly worn. 
C. 8943. Upper m. 2 with inner wall just formed, showing the roots. 
M. 8382. Eight upper molar, much worn, showing roots. 
Presented by the Egyptian Government, 1902. 
M. 8804 a. Right upper molar, much worn, showing roots. Figured on PI, V. figs. 8, 8 A. 
Presented by the Egyptian Government, 1904. 
M. 8804. Right upper molar, rather less worn than last. Figured on PI. V. fig. 7. This specimen 
and the last are veiy large, and may belong to Arsinoitherium andrewsi. 
Presented by the Egyptian Government, 1904. 
C. 9236. Two well-preserved right upper molars. 
C. 8291. Two upper molars considerably smaller than usual, possibly indicating the existence of a 
smaller species. 
C. 7921. Right upper premolar. 
Dimensions (in centimetres) of skulls of Arsinoitherium zitteli : — 
1. 
2. 
3 (type). 
4. 
5. 
C.8128. 
M. 8403. 
C. 8130. 
0. 7805. 
M. 8800. 
Length from condyles to tip of snout 
80 
77 
74 
.... 
65-0 
j) 1 ) bom 
109-4 
100 
78-4 
73-4 
64 
„ „ „ small horn . . . 
42 
38 
38-9 
36 
32-7 
Width of roof at narrowest (between temporal fossje) 
11-4 
13 
9-7 
10-4 
12 
„ at zygomatic arch 
35-6 
33-5 
31-6 
28-3 
31 app, 
Greatest width of occipital surface 
25-7 
app. 26 app. 
24-6 
21 
20 
„ „ between tips of sm.all horns . 
25-4 
app. 21-5 
23-2 
17-1 
17 app. 
„ „ of the combined bases of the large 
horns 
24-5 
27 
24-6 
21 
16-8 
„ of each horn at base (autero- 
posterior) 
18 
22 
15-2 
14 app. 
13-4 
