750 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxx. 



Geographic distribution. — Southern extremit}^ of the Malay Penin- 

 sula. 



Clumicters. — Largest known member of the Sus vittatus group; 

 upper length of skull in adult male about S-iO mm. ; in adult female 

 about 320 mm. Skull essentially like that of Sus vlttatus in form. 

 Teeth similar to those of S\is vlttatux.^ Init much larger, particularly 

 the last two molars both above and below (see table of measurements, 

 pages 755 and 756). Owing to the large size of the skull, however, 

 the teeth do not encroach on the palate, as is the case in Svi^niadensis. 



Measurements. — For measurements see table, pages 755 and 756. 



Specimens examined. — Four, all from Johore. The exact localities 

 areas follows: Gunong Pulai (the typo), Johore Bahru (skin and skull 

 of immature male, No. 125462, collected May 5, 1904), and Mount 

 Austin (skin and skull of immature male, No. 125463, collected May 

 23, 1904). Mr. Kloss has also presented the skull of a young adult 

 male (No. 142469), of which the exact locality is not known. 



Remarks. — This animal is so large that on first seeing the skulls of 

 the two adults I mistook it for a member of the Stis cristatus group. 

 It is, however, readil}^ distinguishable from Sus juhatulus, which it 

 resembles in size, by the simpler structure of the molars. In its robust 

 form the skull of this pig differs notably from that of Sus rh/onis, its' 

 nearest ally geographically. As to external characters the two skins 

 furnish no satisfactory basis for comparison with other forms, as both 

 are in scant, nuich-worn pelage. On posterior half of back there is 

 a noticeable sprinkling of reddish bristles, a character which I have 

 never seen in Sus jubatus ov Sus jubatulus, hut which occurs not infre- 

 quently in members of the vittatus group. 



In cranial characters the two adults and one of the 3^oung (that from 

 Mount Austin) show no variations except those readil}' explained as 

 due to difierences in sex and age. 



The Johore Bahru skull, however (Plate LVII, fig. 1), differs remark- 

 ably from these, as well as from all the other specimens of the group 

 or of the cristatus group that I have examined, in the peculiar shape, 

 of the palatine and pterygoid bones. In the normal form the backward 

 prolongations of the palatines which bound the "interpterygoid"'* 

 space diverge strongly and at the same time rise noticeabl}' above level 

 of palate (skull held upside down), so that if continued l)ackward the}' 

 would extend lateral to and above tips of st^doid processes; outer 

 plate of pterygoid sufficientl}' expanded to form between it and the 

 rather short, broad, hamular process a deep ptei'ygoid fossa; greatest 

 palatal width, including outer pterygoid plate, considerably more than 

 half distance from posterior median edge of palate to foramen mag- 

 num. In No. 125462 the palatine bones diverge so slightly and rise so 

 little above level of palate that they would, if extended, touch the 



«The space here lies chiefly between the palatines. 



