74 U. Ss. P. R. R. EXP. AND SURVEYS—ZOOLOGY—GENERAL REPORT. 
The dental formula may be 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 Zalpa. 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. 
Tip of nose to— Tail to end of— | Length of— 
Current Locality. Breadth | Nature of spe- 
number. } of palm. cimen. 
Eye. | Ear. | Occip.|Rootof) Vert. Hair. | Hand. | Foot. 
. tail. 
567 Hort Ripley, Minn + /2)2.2 22)_ f22ee -92 | 3.25 | 2.83 AOD 13 25 Siete oe ee From specimen 
4 in alcohol. 
568 St. Lawrence .co., N. Y.|-----+|--.--- -92 | 3.00 2.92 AR Sas | ere ere ae coe eS dosatasc 
2219 Middleboro’, Mass .---- -68 | 1.10 | 1.54 | 3. 62 2-80 3.19 a 7D | 1.17 046° eae do-.-s-= 
V5. 4 he ees 2 W0sccssSecese een -65 | 1.05 | 1.58 | 3.67 2.80 3. 00 63 | 1.00 440" iesee do-cceas 
B24e Weoose dose cssacneee 75 | 1.26 | 1.50 | 3.98 2.83 2.98 67 | 1.00 40 Se dos... 2e= 
Pa: al era C0 sane cats eae el eames Senne meme =| Somber 2.85 3. 02 ~15 | 12038 740. “|2-25a i 
2244s | S285 G0passsesno--nee - 70 | 1.23 | 1.50 | 3. 67 2.55 3.00 78 | 1.00 85 LEE do2t.. 
2246s seus dos.254 Sue eee .70 | 1.15 | 1.527) 4.16 3. 03 3.18 76 | 1.05 TSO) nite de-n--== 
2246 i). 22 dole so et see 3165 t) 1580's) 4520 [68i/68:4). sees ce. ese es 75 | 1.00 640 | accu d6.cnks< 
2217 | Essex county, N. Y=---| .67 | 1.20 | 1.55 | 3.76 2.80 3.21 75 | 1.05 oe 916-56 
2234 Meadville, Pa.....---- 108) |p aace= 1.50 | 3.95 2.72 3.07 70 | 1.00 Bt. \oas dd .-= 
2235 Waterville, N. Y...--. i RA = 1.60 | 3.92 2.80 3.05 75 | 1.04 ee dO. nse 
2218 Carlisle Pao o-s nae {00 \areee 1.53 | 3.98 2.63 2.83 74 90 240, |e do s-oa= - 
