A New Subspecies of Porcupine 9 
a bows | A Gilt Has ne av x ws = 
Seles een lee Cem ea) ac = pro) | tae 
ess | sees) ss | se | ms = as | oe 
a | 5* Bey el ees < 
F. e. epixan- 
thum. Ad. 
oa (M.V.Z., 
HOZMLO) a ae I07 72 | 20 37 19 18 26 TQOXI5 84 32 
E. é. nigres- 
cens. Ad. of 
(Type, A. 
M.N.H., 
BOVFA)o osocl| LOR | Oy | GAS lacey Scena 
E. e. bruneri. ; 
Ad. of | 
(Type, U.N., | 
State Ent. 
BOS) pie caees USS GB | BO |) ao Ar || m5.5 || 275 21x16.5 83 | 36.5 
E. é. epixan- | : 
thum. Ad. 
2 (M.V.Z., | ; 
TACHI NS ae.b 98 7I |34.25| 38 | 19.5 | 21.5 24 | 20.5x16.5 | 78.5 35 
FE. é. nigres- 
cens. Ad. Q | 
(A.M.N.H.) | 104 it 29 ORS A A ec Oho 
E. e. bruneri. | 
Subad. 9 | 
(U.N., State 
Ent., 285) O7A5N 07, |) BOs5)) 34 22.5 20.5 26 |22.75X17.5 Ga || Byes 
E. e. couesi. ; 
Subad. ( @ ?) 
(U.S.N.M., 
6501)4..... 86 |64.25| 25 | 30 | 18.25!15.75| 23.75|. 2IxI6.7 | 62.5 | 20.25 
E. d. dorsatum 
Ad. @ (. 
M.N.H., 
16284).....| 96 64 BS NGOS) i) || ay 24 21x17 WO2E|) 3B 
10 Distance from front edge of premaxilla to posterior edge of occipital. 
condyles. 
11 Distance across nasals between postero-superior angles of premaxille. 
12 The width is taken across the widest point between basioccipital 
suture and inferior edge of auditory tube. 
18 Chord of the distance from front edge of the mandibular symphysis 
to the end of the angular process. 
14 Measurements translated into millimeters from Allen, Monog. N. A. 
Rodentia, p. 395, and from the original description of Mearns. 
123 
