74 
U. S. P. R. R. EXP. AND SURVEYS-ZOOLOGY-GENERAL REPORT. 
The dental formula may he given at incisors canines premolars molars = § 
— 44. The anterior upper incisors project nearly horizontally, and are axe-shaped, the crown 
being sub-compressed, widened suddenly beyond the neck, and having a distant resemblance to 
the anterior incisor of the shrews. Those of opposite sides lie very close together, making the 
two halves of a kind of spoon. Next succeeds a very slender thread-like incisor, implanted 
vertically, and then a long canine-like incisor in immediate contact, and almost as much 
developed as the canine of Taljoa. This tooth has a small spur on its trenchant extero-posterior 
edge. Next, after a considerable interval, comes the diminutive canine with a simple fang, 
and then succeed three compressed premolars with double fangs, a central large-pointed lobe 
and two basal ones to each. The last premolar and the three molars are in close contact; the 
anterior premolars, the canine, and the third incisors, are all separated from each other by con¬ 
siderable intervals. 
In the lower jaw the three incisors are directed horizontally forward, the two inner ones com¬ 
bining closely with their fellows of opposite sides, to form one continuous spoon-shaped projec¬ 
tion, with difficulty separable into its four components. The exterior incisor is small and 
thread-like, with difficulty discernible in its situation close to the second incisor. The canine 
is rather large and distinct, and has a posterior basal fang ; the premolars are somewhat like 
the upper ones, and exhibit the same conditions as to interspaces. 
Measurements. 
Current 
number. 
Locality. 
Tip of nose to— 
Tail to end of— 
Length of— 
Breadth 
of palm. 
Nature of spe¬ 
cimen. 
Eye. 
Ear. 
Occip. 
Root of 
tail. 
Yert. 
Hair. 
Hand. 
Foot. 
567 
Fort Ripley, Minn_ 
. 92 
3. 25 
2. 83 
3. 00 
From specimen 
in alcohol. 
568 
St. Lawrence co., N. Y. 
. 92 
3. 00 
2. 92 
3. 33 
do 
2219 
Middleboro’, Mass. 
.68 
1.10 
1.54 
3. 62 
2-80 
3.19 
.75 
1.17 
.45 
_do_ 
2241 
.do. 
. 65 
1. 05 
1. 58 
3. 67 
2. 80 
3. 00 
. 63 
1. 00 
.40 
.do...... 
2242 
.do. 
.75 
1.26 
1.50 
3.98 
2. 83 
2. 98 
.67 
1. 00 
.40 
.do.. 
2243 
.do. 
2. 85 
3. 02 
. 75 
1. 03 
. 40 
_..do...... 
2244 
.do. 
.70 
1.23 
1. 50 
3. 67 
2. 55 
3. 00 
.78 
1.00 
.45 
.do.. 
2245 
.70 
1.15 
1.52 
4.16 
3. 03 
3.18 
.76 
1.05 
.40 
.do. 
2246 
. 65 
1. 30 
1. 20 
3. 68 
. 75 
1. 00 
. 40 
.do.. 
2217 
Essex county, N. Y_ 
.67 
1. 20 
1. 55 
3.76 
2. 80 
3.21 
.75 
1. 05 
.45 
.do.. 
2234 
Meadville, Pa__ 
. 58 
1. 50 
3. 95 
2. 72 
3. 07 
. 70 
1. 00 
. 37 
_.do...... 
2235 
Waterville, N. Y ... 
. 65 
1. 60 
3. 92 
2. 80 
3. 05 
. 75 
1. 04 
. 42 
_do 
2218 
Carlisle, Pa-_ 
.66 
. 
1.53 
3. 98 
2. 63 
2. 83 
.74 
.90 
.45 
.do. 
