Il8 MILLER 



ate between middle molars almost exactly one sixth distance from pos- 

 terior edge of palate to front of premaxillaries (measured along me- 

 dian line). In Szis cristatus the palatal width is contained nearly 

 seven times in the same distance. Dorsal profile of skull slightly con- 

 cave near base of nasals. Zygomata heavier and deeper than in Sus 

 cristatus. Audital bullae noticeably smaller and less inflated than in 

 the Tenasserim pig. Mandible shorter and much more robust than 

 that of Sus cristatus, the outward bulge of the ramus a little behind 

 middle of toothrow greatly accentuated. 



Teeth. — As the teeth of the two specimens of Sus natunensis are 

 much worn, while those of the only skulls of Sus cristatus at hand are 

 not fully grown, it is impossible to make any accurate comparisons. 

 The smaller size of the Natuna pig's teeth is, however, evident for the 

 length of the entire upper toothrow does not equal that of S. cristatus 

 without the posterior molar. The crown of the middle upper molar 

 appears to be more nearly square in outline than that of the Tenas- 

 serim pig, but in the very different condition of the specimens it 

 would be unsafe to assume that this character is constant. 



Measurements, — External measurements of type ; total length 

 1294; head and body 11 17; tail vertebras 177; height at shoulder 

 558 ; hind foot 220 (170) ; ear from meatus 100 ; w^dth of ear 75. 



Cranial measurement of type: greatest length 295 (332'); oc- 

 cipito-nasal length 282 (316) ; basal length 245 (275) ; basilar length 

 235 (263) ; length of nasals 135 (157) ; width of both nasals together 

 posteriorly34 (33) ; median length of bony palate 168 (183) ; width of 

 bony palate at middle of second molar 30 (29) ; breadth between tips of 

 postorbital processes 87 (87) ; least interorbital breadth 64 (65) ; zygo- 

 matic breadth 130 (133) ; occipital breadth 58 (62) ; occipital depth 

 100 (103) ; least depth of rostrum between canine and incisor 33 (39) ; 

 mandible 225 (232) ; depth of mandible through coronoid process 104 

 (no); depth of ramus at front of first molar 40 (41); maxillary 

 toothrow to front of canine (alveoli) 113 (131^); mandibular tooth- 

 row to front of canine (alveoli) 120 (138) ; ci^own of first upper molar 

 12 X 13 (18 X 16) ; crown of second upper molar 18 X 18 (22 x 16). 



Weight. — Weight of type, 40 kg. ; weight of adult female from 

 Pulo Lingung, 35 kg. 



Specimetzs exaf?iined. — Two, one from Pulo Laut, the other from 

 Pulo Lingung. 



^ Measurements in parentheses ai-e those of a Tenasserim specimen (female) of 

 Sus cristatus so young that the posterior molar is not fully in place. 

 *Last molar not fully grown. 



