250 ; BULLETIN NO VIL. 
The phalangial part of the feet is umber brown, the nails 
brownish black. 
The full grown female is smaller, and the colors are lighter 
about the head and shoulders. Nose to anus, 1.8 ft.; tail, 9in; 
nose to eye,1.7; nose to ear,3.6; hight of ear,1.5; breadth of muz- 
zle, 1.8; longest hind claw, 1.2; longest fore claw, 1. There 
are four teats, the first pair being five inches from the clavicles, 
the second seven and one-half. There is a minute claw upon 
the rudimentary thumb. 
A young porcupine collected July 3d, measured as follows: 
Body, 1 ft.,3.25in.; tail,6.25; longest claw,0.7; upper incisors, 0.4. 
The color is vandyke brown, in which is aplentiful sprinkling 
of longer hairs, the outer one-fourth of which are nearly white. ~ 
This gives the whole an ashy appearance unlike the more 
marked coloration of the adult. There is a girdle of elongated 
quills forming a zone over the back in front of the pelvic region. 
In front of this tuft the quills are hidden by the pelage, and 
back of it the fur is denser and darker, and without the gray 
hairs except on the sides where also the quills appear. The 
tail and rump are therefore uniform brown. The under parts 
of the body are rather sparsely covered with fine hair like that 
of the raccoon. ‘The tail is nearly black below. The length 
of the quills of the porcupine varies much. Sometimes they 
are nearly hidden under the pelage, and at others form a very 
conspicuous thicket, especially upon the middle of the back and 
on the hips. There is a prominent tuft of long hairs springing 
from the back of the head. 
Although skeletons were carefully prepared, a subsequentill- | 
ness afforded opportunity for their misplacement, and I can 
only give details of the skull and such notes upon the anatomy 
as were jotted down in the field. 
The skull, (see plate VII) when viewed from the side, at 
once draws attention to the elevation anteriorly. Although a 
plane touching the condyles and the incisors, also touches the 
anterior molars, the distance from the end of the incisors to the 
nasals is nearly 1.50, while from the condyles to the top of the 
occipital is but 0.90. The zygomatic width is 2.60, the greatest 
length 3.50. The nasals along the median line measure 1; the 
frontals the same. The inter-orbital distance is 1.05; the com- 
bined width of the nasals 0.75. The distance from the frontals 
to back of skull is 1.40; from meatus to meatus 1.60. The 
nasals are spatulate convex; the temporals concave, especially 
behind. From the rudimentary supraorbital process there 
