NO. 1466. NOTES OX MALAYAX I'KlS—MIIJJUi. 745 



along nape and anterior half of back the bristles form a distinct mane. 

 The general color is blackish or dark brown, usually somewhat light- 

 ened l\y ochraceous or whitish tips and annulations, though sometimes 

 almost uniform. A whitish streak extends backward from angle of 

 mouth. Skull with rostral portion not specially elongated, the distance 

 from middle of interorbital space to tip of nasals never conspicuously 

 more than twice distance from same region to posterior median point 

 of occiput. 1 lite rptery gold fossa extending so far forward that it lies 

 mostly between the posterior liranches of the palatines. Narrowest 

 region of parietals equal to about half interorbital space. Third lower 

 molar with at least three median cusps, three paired transverse cusps, 

 and a terminal heel representing a moditied fourth group of paired 

 cusps. Mandibular canine of male with outer face much shorter than 

 inner and barely equal to the posterior face. 



In the Mala}^ region these pigs are strictlv coiitined to the mainland 

 and the near-by islands. In the Archipelago they are replaced by the 

 members of the closely related Sus vittatus group. The species may 

 be distinguished as follows: 



KEY TO THE INDIAN AND MALAYAN FORMS OF THE SUS CRISTATUS GROUP. 



Ear large (about 135 by 130 mm.), conspicuously fringed with hairs .30 to 60 mm. 

 long; upper length of skull al)out430mm. ; third inolurboth above and below with 

 terminal portion behind last complete transverse ridge highly complicated in 

 structure, the number of enamel spaces indicated in m? about 10, in ms about 7 

 (see Plates LVIII, fig. 1, and LIX, figs. 1,2) Indian Sus crlstatus 



Ear medium (about 105 by 100), inconspicuously fringed with hairs less than 20 mm. 

 long; upper length of skull usually less than 400 mm. ; third molar both above and 

 below with terminal portion behind last complete transverse ridge simple in struc- 

 ture, the number of enamel spaces indicated in m"* 4 to 6, inm§~ usually 5 (see 

 Plates LVIII, fig. 2, and LIX, fig. 3) Malayan. 



Upper length of skull in adult male about 380 mm Sus jubaiiis, p. 745. 



Upper length of skull in adult male alwut 330 mm Sus juhahdus, p. 746. 



SUS JUBATUS, new species. 

 Plates LV, LVI, LVIII, and LIX. 



Type.— Adult male (skin and skull), No. 83518, U.S.N.M. Collected 

 in Trong, Lower ►Siam, by Dr. W. L. Abbott, in 1896. 



Oeograpliic dlstrihation. — The range of this species, so far as defi- 

 nitely known, does not extend beyond the central portion of the 

 Malay Peninsula. 



Characters. — In general resembling Sus cristatus., but a distinctl}'' 

 smaller animal, the skull prolmbly never exceeding 400 mm. in length, 

 the ears relatively smaller and almost naked, never with a conspicuous 

 fringe of hairs, and the enamel pattern of the posterior portion of last 

 molar both above and below distinctly less complicated. (See Plates 

 LVIII and LIX.) In Sus crtstatm the terminal part of nr^ liehind the 

 second transverse ridge contains from eight to twelve partly or wholly 



