MURIDAIK—ARVICOLINAZX—EVOTOMYS RUTILUS. 
TABLE XXXVI.—Measurements of nine skulls of A. RUTILUS, 
““gapperi”, and “glareola”. 
159 
2 2 3 g Tip of under inei- | § B 
2 | & |esl -2 sors to— SECURE 
Sod) eb eae Sua A oe eae 
No. | Name and locality. Esta ey (Ro ae ; Boi) Slee (es 
& es eae arcu = 5 |/S3ezilagi|/ae 
> a I eA] m = aSispalisad 
oe eh S = to S en a=) = 295 |] mo | te 
Beal ses | Se SVE) Mae eee lee ee ee 
See Se ee a lS icra ae 
1057 | rutilus—Lapland -...-.. 0.95 | 0.30 | 0.52 | 0.17 | 0.20 | 0.15 | 0.52 | 0.68 | 0.65 | 0.20 | 0.24 
tree ocecse (lee prosesbinece bees -| 0.30 | 0.49} v.18 | 0.19 | 0.14 }...... 0.63 | 0.60 | 0.20 | 0.23 
1298 | lll. Cope. 2b ee yesaee. Bem eA San eae OSL ONTO n Oslsuleesaee 0.64 | 0,62 | 0.21 | 0.22 
1252 | glareola—Sweden .. .... 0.96 | 0.30 | 0.54] 0.19 | 0.22 | 0.16 |...... 0.66 | 0.65 | 0.23 | 0.24 
Tiff | gapperi—Lake Superior.| 1. 00 | 0.34 | 0.55} 0.16 | 0.20 | 0.16 | 0.50 | 0.68 | 0.68 | 0.23 | 0,27 
TGR | sccees dopa ete 0.97 | 0.34 | 0.53] 0.18 |-0.21 | 0.17 | 0.51 | 0.65 | 0.68 | 0.23 | 0.27 
1828 | gapperi—Massachusetts.| 0.91 | 0.31 | 0.50 | 0.17 | 0.20 | 0.18 | 0.49 | 0.62 | 0.61 | 0.20 | 0,27 
LeSEe Wlewieise OS eeu sey. ee eee 0.92] 0.31] 0.51] 0.17 | 0.20 | 0.17 | 0.48 | 0.60 | 0.61 | 0.22 | 0.26 
$322 |.----- Goes: Sccesec aac 0. 94 | 0.33 | 0.55} 0.18 | 0.19 | 0.16 | 0.49 | 0.70 | 0.67 | 0.20 | 0.26 
Thus it appears that the differences between the Lapland and Massachu- 
setts skulls are no greater than those discrepancies that occur in either, and 
that all are largely within the limits of individual variation. 
A detailed 
account of the skull, especially as regards dentition, will be found under 
head of var. gapperi. 
measurements.* 
We here tabulate our specimens of true ruti/us, with 
TABLE XXXVIJ.—Mcasurements of sixty-seven (and list of other) specimens of EVOTOMYS RUTILUS from Asia, 
Burope, and North A 
8 Locality. 
alin 
uw 
4a |e 
1468 |....| Kamtschatka............... 
TE (8 fier | aecoee (ln pesca cheeee oe 
404 Soapland\s-cn-lcessnaeee omens 
cD {bese asp GN) oe Seer Seesgreeeneses| eae 
3027 eI | BN hot Na ins Be 3 ee 
6921 |..--| Big Island 
8758 | 2 | Fort Good Hope ..--.....-.- 
6920 |....| Fort Norman .............-. 
5724 
5725 --| Aretic America 
5723 Fort Liard .---.............. 
4563 = 
6917 La Pierre House.....--..--- 
merica. 
Nose to— Tail to— 
Collector. ms 3 s Remarks. 
eI --e]a 
S| 3 a|e £ Salita lee 
Sleleleiieke ale 
Museum Berlin ..... (0. 48 0. 90) 1. 00/3. 40/1, 00)1. 30/0, 37/0. 70/0. 40) Dry. 
Museum St. Peters- |0. 51,0. 99}. . - ./3. 50)1. 15,1. 50.0. 34/0. 62/0. 46). ...do. 
burg. 
Kongl. Svensk Ak. .-}.--- to 1. 08/1. 50,0. 36/0. 65)....].-.. do. 
CU Pees ao somo seone) bine -|3. 60/1. 00/1. 36/0. 34/0. 65)... 2.) .--. do. 
DEGunn i eee --|3. 50) 1. 10/1. 40/0. 36/0. 70)0. 41)... .do. 
i -|4. 00/0. 95)1. 20/0. 32/0. 70}... | Dry ; stretched. 
3. 10)0. 80) t. 25'0. 30)0. 68)....] Dry. 
ING EA ylOMse == cena anlleic eel mma] te 3. 50/0. 90) 1. 30)....|0. 74]....].... do. 
3. 60/0. 80/1. 25.0. 31,0. 69/0. 47 .do. 
pe Besa Pee Bee URC! -.do. 
W. L. Hardisty.....|.--.| ---|.--- 3. 75)1. 00) L. 20/0, 32.0. 68)0, 46). ...do. 
.| A. MeKenzie..-.. .|..- |0. 95/3, 00) 1. 00)1. 25/0. 31/0. 68}0. 39]. . -. do. 
DelOttiecceseeeaseas|e ace camel qatar 3. 50}1. 10)1, 50/0. 36/0, 72/0. 54]. ...do. 
* About thirty other skins, collected by Esquimaux in the Anderson and Mackenzie River regions, 
are prepared so wretchedly as to afford no data of size of the body, while the feet and tail are as with 
the rest. They are therefore not introduced. 
length, a striking instance of the elasticity of the skins of these small mammals. 
Some of these skins measure upward of six inches in 
