HETEROMYS, 371 
breadth of interparietal, 8; length of interparietal, 4.1; length of 
upper molar series, 4.7.” 
378. gaumeri (//etcromys), Allen & Chapman, Bull. Amer. Mus. Nat. 
Hijev,, 1897, Dp. On 
GAUMER’S SPINY Rat. 
Type locality. Chichen Itza, Yucatan, Mexico. 
Geogr. Distr. Yucatan, Mexico. 
Genl. Char. Size large; premaxille and nasals terminating equally. 
Color. Above dark smoke gray; sides lighter, fulvous; lateral 
line and outer surface of fore legs orange ochraceous; outer surface 
of hind legs like back; under parts and inner surface of limbs white; 
ears dusky with white edges; tail crested and tufted, dusky above, 
grayish white below; middle of dorsal surface covered with spines 
which are whitish at base, black apically, and mixed in with orange 
ochraceous hairs. 
Measurements. Total length, 292; tail vertebre, 162; hind foot, 
and claw, 32; ear from notch, 14.5. Skull: basal length, 31; greatest 
length, 37; greatest breadth, 16; interorbital breadth, 10.5; length 
of nasals, 16; length of interparietal, 11; palatal length, 20; upper 
tooth row, 5. 
379. annectens (Heteromys), Merr., Proc. Biol. Soc. Wash., xv, 
TOG2. 1p. 43. 
ALLIED SPINY Rar. 
Type locality. Pluma, State of Oaxaca, Mexico. 
Genl. Char. Size medium; tail long; skull similar to that of 
H. gaumert, but ‘‘smaller, narrower interorbitally, with more 
abruptly spreading zygomata and smaller interparietal.’’ Hind foot 
6-tuberculate. 
Color. Upper parts blackish brown; lateral line fulvous; under 
parts, hands, and feet white, the latter sometimes ‘‘clouded’’; tail 
above dusky, beneath whitish, except tip, which is all dark. 
Measurements. Total length, 300; tail vertebrz, 165; hind foot, 33. 
380. hispidus (Heteromys), Allen, Bull. Amer. Mus. Nat. Hist., 1897, 
De 50k 
Hispip Spiny Rar. 
Type locality. Compostella, Territorio de Tepic, Mexico. 
Geogr. Distr. Territorio de Tepic, Mexico. 
Genl. Char. Pelage soft; soles 6-tuberculate, hairy. 
Color. Upper parts reddish brown, mixed with black-tipped 
bristles; under parts and feet white; lateral line reddish fulvous; 
tail above pale brown, beneath lighter. 
