Gerrit S. Miller

“ Color.—The color is precisely as in Sciurus natunensis, and therefore requires no detailed description.
Skull.—Skull larger than that of Sciurus natunensis (see measurements) but not different in general form. The audital bullæ are, however, readily distinguishable by the much greater development of the anterior inner lobe. In Sciurus natunensis this lobe is so small as scarcely to form any part of the general contour of the bulla. In S. lingungensis it is nearly equal to the anterior outer lobe, together with which it imparts a distinctly triangular outline to the ventral aspect of the bulla. ”

“ Color.—Back uniform ochraceous, fading to buff on sides, the hairs everywhere gray at base. Both back and sides everywhere darkened by black hair tips, but these never sufficiently abundant to produce a dark shading in excess of the ochraceous. The relative proportion of the dark wash to the light under color is precisely the same as in Tragulus canescens and T. napu (from Linga Island) but the black is less conspicuous than in the Bornean form of T. napu. Legs, except white area on inner side, like back but slightly brighter and less shaded with black. ”

“ Behind the collar is a whitish gray median area continuous laterally with narrow light stripe down inner side of fore legs. This light area is sometimes divided by a dark median line joining collar with buff of belly. Belly and chest buff, essentially like that of sides, with which it forms no contrast in color. As on the sides the buff is clouded by black hair tips, but the hairs are scarcely if at all gray at base. On chest the dark hair tips tend to form a median stripe, which is sometimes sharply defined and continuous with the ochraceous line occasionally dividing white of breast. ”

“ Outer surface of ears concolor with neck, inner surface like cheeks. The sprinkling of bluish gray hairs on sides of belly extends irregularly forward to axilla and inner side of front leg, occasionally to throat and chin.
Skull.—As compared with the Bornean form of Sciurus notatus, the skull of S. lutescens is much smaller (greatest length about 45 instead [125] of 50) the rostrum is relatively shorter and broader, and the audital bullæ are less elongate antero-posteriorly. Teeth as in Sciurus notatus except that they are uniformly smaller. ”

“ Width of palate [118] between middle molars almost exactly one sixth distance from posterior edge of palate to front of premaxillaries (measured along median line) . In Sus cristatus the palatal width is contained nearly seven times in the same distance. Dorsal profile of skull slightly concave near base of nasals. Zygomata heavier and deeper than in Sus cristatus. Audital bullæ 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. ”

“ The total number of mammals collected on the islands thus becomes fifty-one. This increase is due, in part to the recognition of a larger number of insular forms than has been admitted by previous writers, but also to a considerable extent to the actual addition of species not hitherto taken. ”

“ Characters.—Allied to Sciurus notatus, but considerably smaller than the Bornean representative of the species. Colors very pale, the under parts buff or cream-buff (Ridgway, pl. v, nos. 13 and 11) irregularly tinged with gray.
Color.—Entire dorsal surface of body and tail a fine grizzle of black and cream-buff, the individual hairs black with two or three cream buff rings. On tail the grizzle is less fine than on back, and it shows a faint tendency to resolve itself into obscure cross bands. On sides of body and on head the cream-buff brightens to buff. ”

“ Cheeks and short median stripe on forehead dull whitish gray. Under parts essentially like back, but buff tinge more diffuse. Feet and ears dark brown. Tail like back but darkening to uniform brown beyond middle.
Newly born young are clear bluish gray, with scarcely a tinge of buff. The three black dorsal stripes are clearly defined and normal in extent.
Skull.—In addition to its smaller size the skull differs from that of the Bornean Arctogalidia stigmatica in the relatively larger braincase, and less prominent audital bullæ. ”

“ About three months during the spring and summer of 1900 were spent by Dr. W. L. Abbott in exploring the Natuna Islands in the South China Sea. [1] Specimens were collected at the following localities: Pulo Midei, or Low Island (May 23-26) , Pulo Seraia (May 29) , Sirhassen Island (June 1-10) , Pulo Subi (June 12-13) , Pulo Lingung (June 17-19) , Bunguran, or Great Natuna Island (June 24-July 31) and Pulo Laut, or North Natuna Island (August 5-13) . About 265 mammals were obtained, all of which have been presented to the United States National Museum. ”

“ Internally it is readily distinguished by the characters of the skull and teeth. From Pipistrellus abramus it differs externally in smaller size, narrower ears, and in the absence of any unusual development of the penis. The incisors differ from those of P. abramus in the same manner as from those of P. pipistrellus.
HIPPOSIDEROS LARVATUS (Horsfield) .
Two specimens (one in alcohol) were collected on Sirhassen Island, June 6 and 7, 1900.
RHINOLOPHUS AFFINIS (Horsfield) . ”

“ Cranial measurements of type: greatest length 52.4 (50.4) ; [20] basal [128] length 44 (43) ; basilar length 41 (41) ; palatal length 23 (23) ; palatal width between middle molars 6 (6) ; greatest length of nasals 15 (14.8) ; greatest width of both nasals together 7.2 (7) ; interorbital breadth 18.2 (17) ; mastoid breadth 23 (21) ; breadth of braincase above roots of zygomata 24 (22) ; zygomatic breadth 30.4 (29) ; depth of braincase at anterior edge of basi-occipital 17.8 (16.8) ; mandible 29 (30) ; maxillary toothrow (alveoli) 9 (9) ; mandibular toothrow (alveoli) 9 (9) . ”

“ Tail, feet and mammæ.—Tail slightly more coarsely scaled than in Mus validus; 9 rings to the centimeter at middle. Hairs scarcely noticeable except toward tip, where they somewhat exceed the breadth of the rings. ”

“ They are strongly convergent anteriorly, and sometimes nearly joined together in front by a median spot. These white stripes are always separated from the anterior stripes by an ochraceous median area varying from 10 mm. ”