RODENTIA-SACCOMYINAE-PEROGNATHUS PARVUS. 
425 
List of specimens. 
Catalogue number. 1 
Corresponding number 
ot skulls. 
c 
C3 
m 
Locality. 
When col¬ 
lected. 
Whence and how ob¬ 
tained. 
Original number. 
Nature of 
specimen. 
Measurements. 
Collected by— 
Tip of nose to 1 
eye. 
Tip of nose to 1 
ear. 
I Tip of nose to j 
occip. 
I Tip of nose to 
tail. 
j Tail to end of 
verteb. 
| Length of fore 
foot. 
a 
°| 
J 
| Length of skull. I 
Ear above notch, j 
2615 
Between Milk & Maria 
Sep. 4,1853 
Gov. 1.1. Stevens.... 
In ale... 
.40 
.75 
.95 
2.25 
2.15 
.30 
.70 
.... 
Dr. G. Suckley.. 
rivers. Neb. 
2614 
Ree Fork, Neb. 
Sep. 24,1856 
Lieut. F. T. Bryan... 
352 
.. .do. 
.45 
.80 
.95 
2.40 2.20 
.30 
.66 
W. S. Wood.... 
1Q31 
1 
Q 
Republican Fork, Neb.. 
Sep. 27,1856 
363 
.. .do. 
.40 
.70 
.85 
1.82 
1.90 
.28 
.60 
43Q 1304 
Grand White R.. near 
1853. 
Capt. E. G. Beckwith. 
(j 
Mounted. 
Mr. Kreutzfeldt.. 
1 
Lit. Salt Lake, Utah. 
A AO 1N()5 
Rocky Mts., 38th par... 
1853. 
270’ 
1665 
Cimarron Riv., (Sand 
1853. 
John Potts. 
Skin •••• 
.42 
.83 
2.17 
2.00 
.60 
.83 
.25 
Cr.,) N. M. 
1043 
San Antonio to El Paso, 
1854. 
Maj. W. H. Emory 
Alcohol.. 
.45 
.73 
.94 
2.20 
2.20 
.30 
.60 
Dr. Kennerly... 
Texas. 
1041 
El Paso to Los Nogales, 
1855. 
38 
.70 
.85 2.00 
1.80 
.35 
.63 
Sonora. 
148 
1130 
El Paso.... 
1851. 
Col. J. D. Graham.... 
Skin .... 
2.002.04 
.25 
.62 
J. H. Clark. 
Chihuhiia trip_ 
Dr. T. H. Webb. 
.40 
.68 
.... 
85 
1.85 
1.60 
.22 
.58 
Matamoras .. 
Lieut. D. N. Couch .. 
.do. 
.45 
.80 
.952.152.40 
.35 
.63 
Dr. Berlandier.. 
2613| 
1 
1 Longest fore claw .11; longest hind claw 08. 
PEROGNATHUS PARVUS. 
Cricetodipus parvus, Peale, Mamin, and Birds U. S. Ex. Ex. 1848, 53. 
Perognathus parvus, Leconte, Pr. A.N. Sc. Phila. VI, Jan. 1853, 225. (His specimen may have belonged to P.jtavus.) 
Perognathus ( Cricetodipus ) parvus, Add. & Bach., N. Am. Quad. Ill, 1854, 328. 
Sp. Ch. —Smallest known species of American rodent? Above, buff, mixed with dusky; beneath, white; entire fore leg 
white. Tail rather longer than the body. Hind foot from heel nearly as long as the head. 
The single specimen collected of this species is not quite mature or perfect enough to admit 
of a satisfactory description. It exhibits, however, decided marks of difference from the other 
species examined, especially in the longer tail and hind feet, both of which exceed those of 
P. fiavus. The auricle is without the lobe of the antitragus, and the sole is covered with scat¬ 
tered hairs, as in the latter species. 
54 L 
