A new pig from Sumatra

Vol. XV, ^{pp. 51-52}

March

_5, 1902

PROCEEDINGS

OFTHB

BIOLOGICAL SOCIETY OF WASHINGTON

A NEW PIG FROM SUMATRA.*

BY GERRIT

S.

MILLER,

^Jr.

Among ^{some mammals}

^collected

by ^Dr. W.

L.

Abbott on

the Indragiri River, eastern

Sumatra, during September,

1901,

and

_presented to the

United

States

National Museum,

^is

^an

adult

male

of the

Nang-oi,

^a large

pig

^{related tothe}

Bornean Sus barbatus

Miiller

and

Siis longirostris

Nehring.

^{It is read-}

ily distinguishable

from

the species of

Sus

hitherto described,

and may ^be known

as:

Sus

oi _sp. nov.

Type.—Kd\x\i male(skin andskull)No.113,150UnitedStatesNational

Museum.

Collected on banks of the Indragiri River (about 30 miles above

mouth)

^{eastern Sumatra,}

September

20, 1901, by ^Dr.

W.

L.

Ab-

bott. Original

number

1319.

Characters.

—

_{Externally most like}Sus_barbatus, but with

body

^even

more

scantily haired(there^isno

mane

andthe skinis

nowhere

concealed

by

^thebristles except on ^the face),

and two

well-developed wartypro- tuberanceson muzzle. Skull essentially as in^Siis longirostris. Teeth smallerthanin SuslongirostrisorS. barbatus, the posteriorlower molar greatlyreducedin size,

much

as inSuscelebensis.

External_features.

— _{The body and}

_neck are sparsely

and

_uniformly sprinkledwithblackbristles

which nowhere

conceal the yellowishwhite

Published

here

by

permission ^of the Secretary of the Smithsonian Institution.

10—Biol. See.

Wash.

^Vol.XV, ^1902. (51)

52 Miller.

— _A New _{Pig from} Sumatra.

skin.

On

sidesandbellythey^are very ^stiff, closely appressed and ^di- rected backward, about²⁰

mm.

inlengthand _nearly.5

mm.

indiameter.

On

_legsthey arelesscoarseintextureandsufficiently

numerous

topro- duceadistinct dark shade.

Along

^{middle of} neck and back they ^in- crease inlength ^toabout 50

mm.,

the diameter at the

same

time de- creasing ^to.3

mm. The

hairs form no mane, but throughout ^{the re-} gion

where

it occurs in other hogs ^{the hairs are less scattered} and appressed than elsewhere.

They

^{are black,} tipped with _yellowish brown.

Head

as inBus_barbatus*, except ^that about

midway

^between eye

and

muzzlethere are

two

well-developed protuberances ³⁰

mm.

in lengthand20

mm.

in breadth densely covered withstiff antrorse bris- tles. Thesebristlesaswell asthose of the upper part ^of the face are uniformly yellowish brown.

On

cheeks they are strong!}' intermixed withblack. Tail scantilycovered with stiff black hairs about 25

mm.

inlength.

They ^nowhere

^{conceal the} skin, but on terminal third are sufficiently close-setalong ^{sides to}forma distinct flattened brvish.

Skull.

— The

skull so closely resembles that of an adult male Sus hn- girostrisfrom Borneothatit

might

readilybe supposed ^to belong ^to an individualof the

same

_species.

Teeth.

— _The

_{teeth, with}the exception ^of the canines, are uniformly smaller

and

narrower than those of Sus lojigirostris.

Upper

^incisors wide _apart, thesecond_separatedfrom bothfirstand^third bya space^of 15

mm.

_{(in S.} longirostristhe distancebetween second andfirstis5

mm.,

that between second

and

third only ² mm.). ^Posterior upper molar withlasttuberclelessthanhalf aslarge ^{as in} the corresponding ^tooth of *S'.longirostris. Third lower molar_consistingofonly

two

crossridges andaterminal heel,theentire length^of the tooth

much

less thanthat ofthe

two

_precedingteeth combined. Informitcloselyresembles

Neh-

ring's figure of the

same

toothin Suscelebensis\

and

is very ^different fromthatof Suslongirostris

and

Suscristatus.X

Measurements.

—

External

measurements

of type: ^total length, 1870;

head and_body, 1575; tail, 295; height^atshoulder, 850; height atrump, 800; earfrom meatus, 88; earfrom crown,97; widthofear, 75.

Weight

113 kg. Cranial

measurements

oftype:greatest length, 480(465)§; basal length, 405(390); basilarlength(totip of premaxillary), 410(397); pala- tal lengthto tipof premaxillary, 330⁽

—

); widthof palate^at

pm.

^{->-, 50}

(45); zygomatic breadth, 162 (148); least interorbital breadth 80 _(76);

length of nasals, 240 _(230); greatestbreadthof both nasals _together,38 (38); occipitaldepth^(tolower rimof foramen

magnum),

¹⁴⁰(140).

*See_{plate xxx,} of Verhandel. over de Natuurlijke Geschiedenis der Nederl. overzeesche bezittingen.

fAbhandl. ^u. Berichte des K. zoologisch. ^u.anthrop.-ethnol. Mus. zu Dresden, 1888-1889, pi. ii, fig. 8.

:j:In Sus _barbatus, this tooth _is, according ^to Nehring, ^{of the usual}

form, that^iswiththreecross ridgesanda terminalheel.

^Measurements

ⁱⁿ parenthesis are these ^of an adult male Sus longi- rostris.