Wo. ]W2. 
NOTES OX MALAY IX PORCUP WES—LYON. 
587 
ATHERURUS ZYGOMATICUS Miller. 
1908. Atherura zygamcUica Millbr, fimithsonian Miscell. Coll, X LY r November 
ft, 1903, p. 42, pi. ii, fig. A, Type-locality: Pulo A or, off coast of Johore. 
Distribution.. —Known only from Pulo Aor, off coast of Johore. 
Type .—Adult female, skin and skull, Cat. No. 112429, U.S.N.M., 
collected on Pulo Aor, off roast of Johore, June t>, 1901, by Dr. W. L. 
Abbott, Original No. 1Q09, 
Diagnostic characters,^ Like Athemrm maerourun, but color 
darker, and zygoma shorter and deeper, underside of malar bone with 
a conspicuous tooth-like process directed backward, lachrymal bone 
muc h smaller, scarcely appearing on dorsal aspect of skull. 
Color* — Very similar to that of At her nr us mao’ourus^ but slightly 
darker, especially along the sides, due to the light area of the spines 
being less in evidence. 
Skull and teeth.- In general, the skull is very similar to that of 
Atherurm macrmtrm of the Malay Peninsula, but in size it is some* 
what smaller and differs conspicuously in regard to the lachrymal 
bones and the zygomata. 
In Atherura maermira the lachrymal is fully 8 mm. in length below the rim of the 
orbit, while above it extends forward a« a triangle of bone at least 5 mm. long, and 
is a noticeable feature of the dorsal aspect of the skull. In A. zygomtilicn its length 
below rim of orbit is usually about 5 mm., * * * while the forward extension is 
often obsolete and never large enough to Ije more than liarely visible when the skull is 
viewed from above. Zygoma shorter than in Atherura viacroura, the jugal deeper in 
proportion to its length, more abruptly concaved above, and its lower contour 
invariably * * * broken by a strongly developed concavity beneath posterior 
jugal suture, this concavity terminating anteriorly on the posterior upper surface of 
a well-marked tooth-like projection.« 
Measurements. —For a comparison of the cranial measurements of 
the type, with the type of Athemrm terutam fund with an adult female 
from Trong, Lower Siam, see page 588. For measurements of the 
series, see table, page 593. 
Specimens era mined, — Seven: nil from 1*1110 Aor. 
ATHERURUS TERUTAUS, new species. 
Type .—Skin and skull of adult male, Cat. No. 123971, U.S.N.M., 
'collected on Pulo Terutau (also written Trotau and Trotto), about 15 
geographical miles west of the. Maiay Peninsula, where the one hun¬ 
dredth meridian east of Greenwich cuts the west coast of the Malay 
Peninsula, April 10, 1904, by Dr. W. L. Abbott Original No. 3223. 
Diagnostic e ha meters. -Like At her imm macj'Ourtts of the Malay 
Peninsula, but smaller, with shorter tail; lachrymal bone much 
smaller, scarcely appearing on the dorsal aspect of the skull. It 
"Miller, Smithsonian M facet 1. Coll., XLV, p. *12, November ft, 1908, and especial ly 
Plate II, figs. 4 and ri, where the above characters are well shown. 
