PART 1 .] 
L^dt'kker: Further Notices of Shvaiik Mammalia. iiS 
Siwalik jaw: the premolars are, however, much squaror, the canine relatively 
longer and sharper, and grooved and concave internally ; further, the face in the 
Siamang is shorter, the hollow in front of the zygoma less deeply channelled, and 
the canine more approximated to the zygoma., and its alveolus much less arched 
than in the Siwalik jaw. Finally, as a character of less importance, all the 
species of Hylobates are of much smaller dimensions than the animal to which 
the fossil jaw belonged. 
There now remain only the Oi’ang, Chimpanzee, and Gorilla among the living 
anthropoid apes, with which to compare our specimen. For this comparison I 
have drawn up the following tables of the dimensions of the upper teeth in these 
animals, and in man and Hylobates, which it may be well to study before pro¬ 
ceeding fui'ther. 
Table showing dimensions of upper teeth in the higher Primates. 
Siwalik jaw 9 
Simla satyrus Q 
0 
10 
a 
-& 
«s 
to 
s 
Troglodytes 
gorilla 5 
Troglodytes 
niger 5 
Human 5 Euro¬ 
pean. 
fi 
“ O 
ci to 
-Q S3 
Antero-posterior diameter of outer incisor ... 
0-30 
0-30 
0-33 
0-30 
0-30 
0-25 
013 
Transverse ditto of ditto ditto 
0-19 
0-23 
0-25 
0-25 
0-26 
0-18 
0'18 
Antero-posterior diameter of canine 
0-53 
0-46 
0-68 
0-80 
0'62 
0-34 
036 
Transverse of ditto 
0-51 
0-38 
0'59 
0 60 
0-45 
0-22 
0-27 
Length of molar series,’ ... 
1-87 
1-94 
2'13 
2-70 
1-80 
1-56 
1-21 
Ditto of premolars 
0-58 
070 
0-74 
090 
0-61 
0-50 
043 
Ditto of true molars ... 
1-31 
1-26 
0-48 
1-80 
1-20 
1-05 
0-80 
Ditto of penultimate premolar ... 
0-30 
0-35 
0-39 
045 
0-31 
0’25 
0-25 
Width of ditto ditto 
0-50 
0-49 
0-50 
0-64 
0'42 
0-39 
0-25 
Length of last ditto ditto 
0-30 
0-35 
0-39 
0-48 
0-32 
0-25 
025 
Width of ditto ditto 
0-35 
0’49 
0-50 
0'60 
0-44 
0-39 
0'24 
Length of 1st molar 
0’45 
0-43 
0-50 
0-55 
0‘45 
0 36 
0-28 
Width of ditto 
051 
0-45 
0-53 
0-60 
0-49 
0-43 
0'30 
Length of 2nd molar 
0-50 
0-42 
0-49 
0-63 
0-43 
0-38 
0-30 
Width of ditto 
0-51 
0-48 
0-53 
0'60 
0-49 
0’43 
0-31 
Length of 3rd molar 
0'41 
0-42 
0-49 
0-60 
0-35 
0-35 
0-28 
Width of ditto 
0-4G 
0-48 
053 
0'60 
0-48 
0‘41 
0-30 
