so. 1<Vj2. 
NOT ICS ON MALAYAN PORCUPINES—L TON 
588 
thivn has been shifted backward in Thecmrm and is found on the first 
dorsal vertebra; the very long neural spine on the first dorsal of 
Acanthion occurs on the second dorsal in Theeurm* The lumbar 
vertebras (Plate LVII , fig. 10) in 'Thee arm have large rectangular lateral 
processes, directed anteriorly much as in Acanthion, but the processes 
are rather more slender. The first and one-half of the second sacral 
vertebrae serve for the attachment of the ilia. The presternum is 
relatively shorter in TKecurm than in Acanthion and the expanded 
part is relatively wider. The limb lames are relatively short and 
heavy, proportioned as they are in Acanthion, but the anteriorly pro¬ 
jecting u knee” ut about the middle of the tibia is more pronounced. 
The scapula is somewhat wider, in proportion to size, in Thccurm 
than in Acanthion. It is almost identical in size and shape to the 
scapula of At her ur us. 
THECURUS SUMATRA, new species. 
Type. Skin and skull of adult male, Cat. No. 143432, U.S.N.M., 
collected at Am Bay, east coast of Sumatra, January IT, 1906, by Dr, 
W. L. Abbott. Original No. 4037. 
Distribution ..— Known only from the vicinity of Aru Bay, Sumatra. 
Diagnostic characters, —The same as given for the genus above. 
Color* — Genei*al . color on top of head and anterior half of back, 
much like a dark drab of Kidgway, specked, especially on top of neck 
and toward the sides with the dirty white tips of the spines. Sides of 
head and neck and underparts drab, conspicuously specked with the 
dirty' white tips of the spines. Under side of neck dirty white or 
cream-buff, crossed by a drab collar 25 to 30 mm. wide. The feet and 
legs are darkened almost to Ilidg way's seal brown. The quills are 
blackish, with dirty whitish tips of 20 to 25 nun. Spines on the lower 
back blackish with short (about 5 mm.) light-colored tips. 
Skull mid teeth ,-—The characters of the skull have already been 
described. The skulls as a whole show a great deal of individual 
variation in respect to size, comparative width of skull, and length of 
nasals. (See table of measurements, p. 593.) The teeth show equal 
variation in size, No. 143434 having the length of upper toothrow 
19.5 rum. and No. 143435, with teeth worn to the same extent, 1T.2 
mm. Wear produces very striking effects on the teeth; reentrant 
angles seen in the young and in the young adults are entirely lost in 
old individuals, and judging by the teeth alone one might easily con¬ 
sider young and aged adults to belong to different genera. 
Measurements. — External measurements. (See table, p. 593.) Cra¬ 
nial measurements of the type: Basal length, 92.3 mm,; basilar length, 
85; candylo-basal length, 99.4; greatest length, 108; upper length, 
103.7; palatal length, 51,3; zygomatic breadth, 56; distance between 
outer margins of external auditory meatus, 42.8; interorbital constric- 
