MCE lUTI 1 E li lUM LYONS [. 
121 
fio-. 2 c ; also PI. X. 1. Tlio vertcLra is figured on PI. Xl. fig. 4. Middle Eocene. 
The dimensions (in centimetres) ol.’ the mandible and lower teeth are : — 
Total length 32 
lleiglit of condyle above inferior border 15 3 
Length of molar and premolar series 17’2 
Jji'iiKtli. WicUli. 
2JM.2 2-2 l-G 
pm. 3 2-3 21 
pm. 4 2-5 2-3 
w. 1 2'G5 2-45 
m.2 3o 3 
m. 3 4 2 3 
M. 8146. 
C. 7867. 
Plaster cast of the above specimen. 
Made in the British Muse 
um. 
Nearly complete skull of a young individual in which the second incisor and last molar 
are not yet cut. The description of the skull given in this volume is founded mainly 
upon this specimen, which is figured on PI. VIII. and PI. IX. fig. 1. Upper Eocene. 
The approximate dimensions (in centimetres) of this skull are: 
Greatest length from end of condyles to tip of snout ... 35 
Length from hinder border of palate to tip of snout .... 21 
„ summit of occiput to tip of snout 32 
Greatest width at zygomatic processes of squamosal .... 22-7 
,, of occipital surface 17 4 
„ of supraoccipital escutcheon t)’7 
Height of occipital surface above /or«>w«w mupHHni .... 8'7 
"Width between outer angles of condyles 9'3 
,, of skull-roof at temporal fossa G 
„ „ orbits G’G 
,, of glenoid surface 7'3 
„ of palate between jn. 1 3-3 
„ of foramen magnum 4-2 
Length of premolar series 7‘3 
The dimensions (in centimetres) of the teeth are : — 
Lengtli. Width. 
2^1. 2 2*7 2 
2jm. 3 2’.5 2'8 
yjm.4 2-1 2-8 
m. 1 3 2'G 
m. 2 3 2 2-9 
It. 8875. Plaster cast of the above specimen. Made in the British Museinn. 
M. 9225. Skull, very slightly crushed and nearly complete, with the exception of the zygomatic 
arches : the nasals are well preserved and terminate anteriorly in points which overhang 
the narial opening. The vertical plates of the pterygoids are thick and appear to have 
a descending plate of the alisphenoid fused on their outer face ; there is an alisphenoid 
canal opening anteriorly into a groove running upwards and forwards, as in Falao- 
It 
