250 BULLETIN NO VII. 



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, 1.3; 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 a plentiful 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 subsequent ill- 

 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 

 f rentals the same. The inter-orbital distance is 1.05; the com- 

 bined width of the nasals 0.75. The distance from the f rentals 

 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 



