NOTES ON MALAYAN PIOS—MILLER. 747 



c/'Mtatus group, though whether it is the same as Stis jvhatulm I am 

 unable to .say. The principal measurements of the adult skull are as 

 follows: Upper length, 302; basal length, 268; basilar length, 254-; 

 palatal length, 1S9; width of palate at pm J-, 32; width of palate, 

 including last molar, 01. 6; least width of palate at front of last molar, 

 22.'1; zygomatic breadth, 130; least interorbital breadth, 63.0; parietal 

 constriction, 33; nasal breadth at posterior extremity of premaxillaries, 

 29.6; length of nasals, 144:; occipital deptii, 93.6; mandible, 228; max- 

 illary toothrow, 112; m ^, 20 by 18; m •% 32 l)y 19.(): mandibular tooth- 

 row, 106; m o, 20.4 by 1.5; m j, 35.6 by 16.6. 



III.— THE SUS VITTATUS GROUP. 



Throughout that portion of the Malay Archipelago thus far (explored 

 by Doctor Abbott, the members of the Sui< vittatiiH group are the most 

 numerous of the wild pigs. They occur from the Natunas on the east 

 to the Nicobars and Andamans on the west, but are not yet known 

 from the Malay Peninsula, except at its southern extremity. Although 

 not certainl}" distinguishable from Sus juhatus in general external fea- 

 tures, at least so far as these are shown by the skins, the animals are 

 immediatel}' recognizal^le by the reduced condition of the posterior 

 molar. In the upper jaw this tooth (Plate LVIII, tig. 3) contains two 

 cross ridges and a very small terminal heel; while in the lower jaw 

 (Plate LXIV, tig. 1) it ma}" terminate al)ruptl3'^ at the third cross 

 ridge, which is often reduced to a single median tubercle, or a minute 

 supplemental tubercle may occur behind this ridge. The lower canine 

 in males resembles that of Sus crisfatvs and Siix juhatus. 



Among the fortj^-one specimens in the National Museum, 1 tind the 

 following species: 



KEY TO THE MEMBERS OP THE SUS VITTATUS GROUP COLLECTED BY DOCTOR ABBOTT AND MR. K LOSS. 



Uppei- length of skull in adult male less than 290 mm., in female less than 270 nun. 



Length of upper toothrow about 83 mm Sus anduiiutm'nxi.'t, p. 754 



Length of upper toothrow about 95 nnn. 



Palate wide, distinctly exceeding width of m'^ i)osteriorly. 



Sus nicoharicus, p. 754 

 Palate not very wide, scarcely or not exceeding widtli of m^ posteriorly. 



Sns mlmus, p. 753 



Upper length of skull in adult male more than 290 mm., in female more than 270 mm. 



Upper molars much enlarged, the greatest breadth of m'* noticeably greater than 



width of palate at front of this tooth Sns iiknkiisii', p. 751* 



Upper molars not specially enlarged, the greatest breadth of nv' usually much 

 less than width of palate at front of this tooth. 

 Width of palate including third molars less than half length of toothrow to 

 front of canine in males or to third in(;isor in females. 



Width of parietal constriction ecjual to or greater than combined width 



of nasals at i>osterior extremity of premaxillaries ..Sns vittatus, j). 748 



Width of parietal constriction decidedly less than combined width of 



nasals at posterior extremity of premaxillaries Sus rluonis, p. 749 



