Mammals Collected by Dr. W. L. Abbott on the Natuna Islands: Proceedings of the Washington Academy of Sciences, Vol. III, pp. 111-138 — John Stuart Mill — John Shaqi
Mammals Collected by Dr. W. L. Abbott on the Natuna Islands: Proceedings of the Washington Academy of Sciences, Vol. III, pp. 111-138
John Stuart Mill · en
_Skull and teeth._--The skull is throughout much smaller than in
specimens of _Tupaia tana_ from Borneo. In form it differs from that
of _T. tana_ in less slender and elongate rostrum, narrower braincase
and slightly shorter audital bullæ. Suborbital vacuity much broader
than in _T. tana_. Teeth as in the Bornean animal.
_Measurements._--External measurements of type: Total length 355;
head and body 203; tail vertebræ 152; hind foot 46.4 (44). Average
and extremes of four adults from the type locality: total length 367
(365-371); head and body 203; tail vertebræ 163 (162-168); hind foot
45.4 (44-46.6); hind foot without claws 42.5 (41-44).
Cranial measurements of type: greatest length 54.6 (61);[25] basal
length 49 (54); basilar length 46.4 (51); median palatal length 48
(53); distance from lachrymal notch to tip of premaxillary 27.6 (31);
least interorbital breadth 14.4 (16); zygomatic breadth 25 (28.4);
mandible 38 (41); maxillary toothrow (behind diastema) 20 (21.4);
mandibular toothrow (behind diastema) 17 (18).
_Specimens examined._--Five, all from the type locality.
GALEOPITHECUS VOLANS (Linnæus).
1894. _Galeopithecus volans_ THOMAS and HARTERT, Novitates
Zoologicæ, I, p. 657. September, 1894 (Bunguran and Sirhassen).
Two specimens from Sirhassen and two (one young in alcohol), from
Bunguran. Also foetus of one of the Sirhassen specimens.
EMBALLONURA ANAMBENSIS Miller.
Four specimens from Bunguran. These agree essentially with the Anamba
animal, but show some slight cranial peculiarities.
PIPISTRELLUS SUBULIDENS sp. nov.
_Type._--Adult female (in alcohol) No. 104758 U. S. National Museum.
Collected on Sirhassen Island, South Natunas, June 3, 1900.
_Characters._--Similar to _Pipistrellus pipistrellus_ (Schreber) in
size, color and external form, but skull with broader rostrum, and
inner upper incisor without supplemental cusp.
_Skull._--The skull is of the same size as that of _Pipistrellus
pipistrellus_, but the braincase is narrower and more elongate, and
the rostrum is very markedly shorter and broader. The great breadth
of the anterior portion of the skull involves also the palate and
interpterygoid space, both of which are noticeably wider than in
_Pipistrellus pipistrellus_. Audital bullæ slightly smaller than in
the European species.
_Teeth._--The teeth are essentially as in _Pipistrellus
pipistrellus_, except that the inner upper incisor lacks the
small supplemental cusp. Mandibular teeth wider than those of _P.
pipistrellus_.
_Measurements._--External measurements of type: total length 76; head
and body 41; tail 33; tibia 14; foot 6; calcar 10; forearm 32.4;
thumb 6; second digit 30; third digit 60; fourth digit 53; fifth
digit 43; ear from meatus 11; ear from crown 9; width of ear 9.6;
tragus (measured in front) 4.