TEIJTIAKT YERTEBEATA OF THE FAYOM. 
2.-3G 
iiiicci faiii wlioflier lliis luul two or tliree root?. In tlio mandible the only teeth preserved 
are llio ihn'e posterior ]»reinolars. Fianred FI. XXL In the following table the 
dimensions (in centimetres) of this sknll are placed in the first column, the corresponding 
measnrennmts in l^rofocd us afurus according to E. Fraas, and in .Zeu(/lod(>n osh'is 
according to Stromer, being given in the second and third columns respectively : — 
Length from the end of the snout to tlie occipital crest 
„ ,, ,, ,, foramen magnum 
,, from binder border of the narial opening to the occipital crest 
„ oi' the nai'ial o})ening 
Bread! li of the narial opening 
Length from the ])osteriur border of the frontals to the occipital crest 
Width of the skull at the narial opening 
,, at the supraorbital expansion 
,, ,, between the temporal fossje 
„ ,, at the zygomatic process 34 ajip. 
Jleiglitof occi])ital surface above the upper edge of theforamen magnum. 
Width between outer ends of condyles 11 app. 
,, of foramen magnum 
Length of premaxilla 31) 
., nasals 
(Ireatest breadth of nasals taken together 
Distance between jugal and postorbital process of frontal 
The dimensions (in centimetres) of the n])per teeth (or, where absent, 
alveoli) : — 
'I'ozciKjlodon 
Proioceius 
Zenffloflon 
atrox. 
ataviis. 
oniris. 
(10 
GO 
70 app. 
til app. 
58 
G8 
31) 
43 
3() 
7 app. 
7 
3-8 
2-5 
1 iro app. 
20-5 
9-4 
4-3 
34-5 
lG-7 
24 (?) 
4'5 
3-3 
34 a])p. 
34 
38 (?) 
11-8 
8 
13 (?) 
11 app. 
5 a[)p. 
2-G 
39 
30 
34-5 
ir)-3 
18-5 
IG 
4o 
3-5 
4-4 
3-5 
1 (or, where absent. 
of their 
i. 1 (at alveolus) .... 
b 3 „ 
'•3 ,, 
c. ,, 
1 
ju». 3 
jiiji. 
JUU. 4 
?//. 1 
J.erigth of incisor series 9 cm. 
Length. 
Width. 
1-8 
1-3 
2-3 
1-4 
1-9 
1-3 
3-7 
1’8 app 
9 
9 
4-7 
1-3 
4-5 
1-S 
O' / 
1-7 
1-8 
Length of [U'emolar series IS‘3 cm. 
K. 9266. Portions of a much biad^en sknll, including flic posterior (cranial) rc'gion, the Irontal 
expansion, the maxilla, and the jiremaxilla ; the last contains no teeth, but in tlu^ 
maxilla you. 3, ]un. I, and part of di. 1 are still in situ, and show the three roots of 
the (iremolars (text-fig. 82). The cranial la'gion is inteix'sting, because nearly all tlu^ 
sutures remain open, and the structure of the occipital region is w('ll shown (text-lig. 81 ). 
From this specimen a brain-cast similar to the natural brain-cast d('scrib('d by 
Dr. I'llliot Smith* has been made (]\1. 92(15). I he dinumsions (in centimetres) ol 
this speeinien are : — 
Proc. Roy. Soc. vol. 71 (19U3) p. 323. 
