with white stripe down inner side of hind legs. This stripe is usually divided on thigh by encroachment of the surrounding ochraceous. Tail silky white below and at tip, essentially like back above.

Skull.—The skull of Tragulus bunguranensis fully equals that of T. canescens in size, and distinctly exceeds that of the Bornean form of T. napu. It is much larger than that of T. nigricans, which proves to be a medium sized species like T. rufulus. In general form the skull agrees so closely with that of Tragulus canescens that it is only to be distinguished by its slightly greater relative breadth and smaller, less inflated audital bullæ. As compared with the skull of Tragulus nigricans,[7] that of T. bunguranensis is much larger (distance from back of occiput to front of canine 103 instead of 92, zygomatic breadth 53 instead of 45), and the braincase is more conspicuously ridged for muscular attachment. That part of the braincase immediately above posterior root of zygoma is more conspicuously inflated. Otherwise I can detect no salient differences in the skulls of the two animals.

Teeth.—The teeth are uniformly larger than those of Tragulus nigricans, but in form they present no characters of importance. As compared with T. canescens the premolars both above and below are conspicuously more robust, a character in which the Bunguran animal agrees with the Bornean form of Tragulus napu.

Measurements.—External measurements of type: total length 647; head and body 571; tail vertebræ 76; hind foot 146; hind foot without hoofs 128. Average and extremes of five adults from the type locality: total length 643 (628-673); head and body 566 (558-584); tail vertebræ 77 (70-89); hind foot 142 (140-146); hind foot without hoofs 126 (124-128).

Cranial measurements of type: greatest length 114; basal length 107; basilar length 100; occipito-nasal length 106; length of nasals 32; diastema 13 (9);[8] zygomatic breadth 52 (46); least interorbital breadth 33 (28); greatest breadth of braincase above base of zygomata 38 (33); mandible 91 (78); maxillary toothrow (alveoli) 38 (34); mandibular toothrow (alveoli) 44 (39); anterior upper premolar 7 × 3.8 (6.4 × 3); middle lower premolar 7.2 × 3 (5.8 × 2.4).

Weight.—Weight of type 3.8 kg.; of two other males 3.6 kg. each. Two adult females weigh respectively 3.6 kg. and 4.2 kg.

Specimens examined.—Six, all from the type locality.

Remarks.—Tragulus bunguranensis is so distinct from the other known species as to require no detailed comparisons.

TRAGULUS sp.

Two specimens from Sirhassen Island are too immature for determination. Apparently they represent a member of the napu group, allied to that occurring in Borneo. The throat markings show no approach to those of Tragulus bunguranensis.

TRAGULUS JAVANICUS (Gmelin).

1894. Tragulus javanicus Thomas and Hartert, Novitates Zoologicæ, I, p. 660. September, 1864 (Bunguran).

1895. Tragulus javanicus Thomas and Hartert, Novitates Zoologicæ, II, p. 492. December, 1895 (part, specimens from Bunguran).

Six specimens from Bunguran.

TRAGULUS PALLIDUS sp. nov.

1895. Tragulus javanicus Thomas and Hartert, Novitates Zoologicæ, II, p. 492. December, 1895 (part, specimen from Pulo Laut).

Type.—Adult female (skin and skull) No. 104616 U. S. National Museum. Collected on Pulo Laut, North Natuna Islands, August 11, 1900. Original number 625.

Characters.—Smaller than Tragulus javanicus from Borneo or Bunguran and very pale in color. Black clouding of upper parts inconspicuous, but dark nape band well defined.

Color.—Back and sides light ochraceous-buff everywhere clouded by the blackish hair-tips, but these never in excess, except perhaps along middle of back and across lumbar region. Flanks, shoulders, neck, outer surface of legs and narrow line dividing color of sides from that of belly pale ochraceous. Nape band clear black, sharply defined from color of sides but quickly fading into that of shoulders. Top of head dull dark brown. A faint pale stripe over and in front of eye. Throat markings normal, the dark bands like neck. Collar very narrow. Under parts and inner surface of legs white. A faint yellowish shade along middle of belly. Tail white beneath and at the tip, ochraceous faintly shaded with brown above.

Skull.—The skull of the type, though fully adult and with all the teeth distinctly worn, is smaller than in Bunguran specimens so young that the posterior molars are still below the rim of the alveoli. In form, however, it shows no marked peculiarities, though in general it appears to be somewhat broader in proportion to its length than that of the Bunguran animal.

Teeth.—Teeth as in specimens of Tragulus javanicus from Bunguran except that the premolars, both above and below, are shorter and broader, a difference which may prove to be an individual peculiarity only.

Measurements.—External measurements of type: Total length 539; head and body 444; tail vertebræ 95; hind foot 107; hind foot without hoofs 95.

Cranial measurements of type: Greatest length 90 (94[9]); basal length 83 (87); basilar length 78 (82); occipito-nasal length 83 (89); length of nasals 25 (29.6); diastema 9.2 (9.8); zygomatic breadth 41.4 (40); least interorbital breadth 26.4 (25); breadth of braincase over roots of zygomata 29.4 (28.4); mandible 72 (75); maxillary toothrow (alveoli) 31.6 (34); first upper premolar 6.4 × 2.8 (7 × 2.6); mandibular toothrow (alveoli) 35.8 (38).

Specimens examined.—One, the type.

Remarks.—This is a pallid form of Tragulus javanicus, a species which apparently shows very little tendency to become differentiated into local races. The characters of the Pulo Laut animal were pointed out by Thomas and Hartert in 1895.

SUS NATUNENSIS sp. nov.

1894. Sus sp. Thomas and Hartert, Novitates Zoologicæ, I, p. 660. September, 1894 (Bunguran).

1895. Sus sp. Thomas and Hartert, Novitates Zoologicæ, II, p. 492. December, 1895 (Bunguran).

Type.—Adult female (skin and skull) No. 104856 U. S. National Museum. Collected on Pulo Laut, North Natuna Islands, August 6, 1900. Original number 609.

Characters.—Externally much like the Tenasserim form of Sus cristatus, but smaller; body brownish in marked contrast with black legs and face; skull conspicuously shorter and broader.

Fur.—The