Mr. O. Thomas— Notes on Babirussa. 187 
Babirussa bubyrussa frosti, subsp. n. 
Size slightly smaller than in babyrussa. Upper canines as 
in the latter, not bent in, crossing each other or compressing 
the nasals, as is the case in B, celebensis. But they are con- 
spicuously smaller and shorter than in babyrussa, and do not 
rise nearly so high above the muzzle as in that animal. 
Basial pits almost always absent, only occurring (an | these 
shallow) in two out of eleven skulls. Bullee small, nariow, 
flattened from side to side, their breadth much less than their 
horizontal diameter, in marked contrast to the broad sub- 
triangular bulle of typical babyrussa; the crest lewling 
upwards from their outer corners behind the glenoid fosse 
well developed, much higher than that on the outer side of 
the base of the paroccipital process, this proportion being 
reversed in babyrussa. Paroccipital process more slender. 
Dimensions of the type-skull :— 
Length, nasal tip fo occiput, 274 mm.; condylo-basal 
length 268; zygomatic breadth 124; nasals, length 131, 
anterior breadth 22, mesial breadth 15, posterior breadth 31 ; 
occipital breadth 73; palatal length 178; bulle, horizontal 
length 25, breadth 13. 
Length of canine along front curve 141, greatest length 
above nasals 45; greatest basal diameter 13. Front of p* to 
back of m® 68; m’*, length 22, breadth 15. Length of lower 
canine 77. Length of lower tooth-row 74. 
The older skulls may attain to 284 mm, in condylo-basal 
length, 
flab. Tali Aboe Island, east of Celebes. 
Type. Adult (but not old) male skull. B.M. no, 19.11.23.1. 
Presented to the National Collection by Wilfred Frost, Esq. 
Kleven skulls examined, 
In the above various points there is such a strong average 
difference between the Babirussa of Buru and the form found 
in Tali Aboe that I think the latter should certainly bear a 
varietal name, even though some of the points may prove to 
be rather “ average” than absolute characteristics. 
Six of the skulls (including the type) were obtained by 
Mr. Frost on the comparatively high middle third of Tali 
Aboe, while the other five came from the lowlands of the 
eastern third. The latter skulls—of which three at least are 
fully adult—are rather smaller than the former, but the 
difference does not amount to much, and is, perhaps, due to a 
shortage of the food available in competition with the native 
pigs of the lowlands. 
. 
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