NO. JfifVZ. 
XO'H'S ox MALAYAN PORCUPINES-LYON. 
589 
processes, a more slender mid pronounced rostrum, zygomata more 
converging anteriorly, ami a heavy grooved malar of nearly uniform 
width throughout its length, which is subtended by a considerable 
backward extension of the maxillary portion of the zygoma. Molars 
rooted. 
Description of skin. Size small, somewhat less than that of Aihe- 
: runu, tail relatively longer. Upper parts and sides of body covered 
with spines more flat and less stiff than in Aiherurm* grooved both 
above and below, of about the same length (25 to 30 mm.) all over the 
back. Interspersed among them are a very few stiff bristles, about 
75 nun. long. The head, underparts, and the legs are covered with 
softer, shorter bristles. The extreme base of the tail is covered with 
spines like those on the back. The greatest portion of the tail 
is covered with welbdc lined scales, each subtended by a single 
hair. Toward the tip the scales grow larger and the subtending hairs 
become longer (about 100 mm.), flat, hollow bristles of uniform width 
throughout their extent. (Plate LYII, tig. 4.) 
Skeleton. The main features of the skull of the genus TricJnj* have 
previously been pointed out The relative size and shape of the skull 
and of its various parts are clearly shown in fig. 3, Plates 1*1 V, LV, 
ami LYI, so no detailed description is here necessary. The vertebral 
formula is: Cv, 7, D. 10, L. 5, S. 3, Cd. 25. The axis bears a large 
laterally-compressed neural process, strongly curved and bent back¬ 
ward. (Plate LVII, tig. 5.) The neural spine of the seventh cervical 
is short as it is in Tkecurus and Athemrus, The lateral processes of 
the lumbar vertebra* arc rather slender, curved, and directed forward, 
and with a somewhat pointed apex, (Plate LYII, tig. 0.) The sacrum 
is of form similar to that of Athmirm; it contains three vertebras ami 
to the first of these the ilia are attached. The prestern urn is relatively 
short, and with a relatively narrow anterior expansion. The humerus 
and the bones of the forearm arc proportioned as they are in the 
genus At/urttrm. The femur is relatively more slender in Trichys 
than in the other genera, and the metatarsals and phalanges are some¬ 
what longer than they are in the genus Alherurux* In Tricky* the 
scapula is much narrower than in the other genera, and its anterior 
border is strongly rounded off. 
TRICHYS FASCICULATA (Shaw),* 
1801. Hystrfa fmcimlata , Shaw, Gen. Zool, 11, Pt. J, Mamm., p. 11, pi. cxxiv. 
Typed oonlity: M a I ticca. 
1830, .I thentra JaKicuhttii, Bessei-t, Gardens and Menagerie Zoo). Soe. London, 
pp, 175-178. 
o While these aides have been going through the pres* Mr. Oldfield Thomas (Proc. 
lliol. Hor. Washington, XX, p. 66, June 12, 11*07) has attempted to show that Iltjstrix 
fitKcicidaki Shaw, based on Bnffon'ia Porc-epic de Maiaca, is a synonym of Hystrix 
macroura Linmeus. Although Mr. Thomas is probably right in his conclusion as to 
