194 MONOGRAPHS OF NORTH AMERICAN RODENTIA. 
Tabin XLVIII.— Measurements of twenty-nine specimens of northern ARVICOLZ of the RIPARIUS type, and not 
distinguishable from that species. 
Tail to 
Nose to— esate 
ry Date. Locality. Collector. na Remarks. 
2 ; eal aaies! |e Z ca 
5 |# S\e(S/BlS\slels 
A |a AIA/OIAIF IRA la : 
6846 |....| July —, 1861 B. R. Ross ...--- 20H ecules bon] Reed | 38 ESse|loced|| Aha 
4548 | 3° | Apr. 30,1860 Peet) AG Seaooscn: 0, 45,1. 05)1. 20/4. 70/1. 05)1. 15/0. 31/0. 68) Fresh, except feet. 
4549 | @ | Mar. 30, 1860 Cee OO Lean eee [Deby Hotee) 1, 20/4. 35)1. 25}1. 35/0. 35/0. 65) Fresh. 
4550 | & | Apr. 26. 1860 Sao 0) snSsc5-ha0- 0. 59,0. 95) 1. 20/4. 45/1, 15}1. 25/0. 35)0. 65)... .do. 
4576 |..-.| May 30, 1860 |. Peoel! (sea scss amc met eee] Sees | eee] ere | ee ----|----| Suckling. 
4577 |..-.| May 30, 1860 Sates 3s 6/5350] pecol las Ba ee al aoe oe 
4578 |....| May 30, 1860 Bee Gneseisccinhs Beet eral Seer Read Meso Beecl heme bese eeeetiles 
10290 |.-..| May 30, 1860 --d0 -----.----- SEH \ao-2| hone| hosel tine esciissee|fainas|faeo-Gl), 
yb head [ousseocs ieaooSS Sei OV nes ss sacin |e joao pace etal ao Sal Saree emt) MALTY 
ETE) bast seeseoseesees R. Kennicott.-. |....].-- ---.|4. 25) 1, 15/1. 35/0, 35/0. 75) Dry. 
4567 | ¢ | Sept. 6, 1859 bi3.00)\-t--tees ~-- 0. 55/1. 05/1. 20/4. 50/1. 6C| L. 75/0. 32/0. 79) Fresh, exeept feet. 
4568 | 9 | Sept. 16, 1869 |. Ss00)s52 sacen24 0. 50/6. 95)1. OF }4. 10/1. 50}L. 75/0, 35/0. 73) Fresh ; ear behind 
0.42, 
4571 || 9" | |Sept. 1,.1859)).--. do). -- = (0. 50/0. 95) 1, 20/4, 00} 1. 50} L. 70/0. 32/0. 75) Fresh. 
4572 | 9 | Sept. 5, 1859 |. -|0. 50)0. 90) 1. 10/4. 00)1, 50/1. 70/0. 33/0. 75) Fresh ; ear 0.40. 
4573 | 9 | Sept. 16, 1859 |.. 0. 45,0. 95/1. 00)3, 90/1. 55}1. 75/0. 30/0. 65) Fresh ; ear 0.42. 
4574 | Q | Sept. 5, 1859 Ssortasheagsccs - |0. 50)0. 90)1. 15/4. 30/1. 6C) 1. 90/0. 34)0. 79] Fresh. 
4566 | 9 | Feb. 15,1860 | Fort Liard. -|.---|.---] 1. 25)4. 20/1. 60] 1. 75/0. 35/0. 74) Dry. 
4569 | ¢ | Oct. 3,1859 |...... G0)ee nase ac oaaaeee f 0. 52/0. 98)1. 10/4. 30)... |..-.|0.32)0. 75) Fresh, except feet. 
4570 | ¢ | June 5, 1860 | Winnethy River.....- Soe 10. 55] 1. 00) t. 25/4. 50)... |... |0. 31/0. 73)... .do. 
sonsce ----|--.------.--- | Red River Settlement. w---]---.|--- [4 25) L. 4C/L. 60/0. 34)0. 69) Dry. 
na2a2° a sh\ eens becca 35) Rone eee eee ae .-..|.---].--.]3. 80/1. 35} 1. 55)0, 31/0. 70]. .-. do. 
eases £364 PaSsenpes-Sec5| paeeec Uisemceanern sar .-- |--- |--- [4. 30/1. 25/1. 50/0. 33/0. 73]. -..do. 
ae Olesen eee ree w---[----|.-- [3. TOL. 30)1. 50/0. 32/0. 68). - --do. 
Nelson River ......--. enie|ee= | oe |f-=a, [LL 20/L25010: 3110.167]/5--- dos 
setts Ceres Sescgen: .-- |---.|.--.}4. 00/1. 00}J. 10/0. 30/0. 65]... .do. 
ee ORE Peer Mee Perec emo Sao aer lined ors) bere |esey (hard (hCG les o4i Ch 
Selkirk Settlement... |....do .....--.-- |..-.|..-.]..-.|4. 25], 10/1. 20/0. 35/0. 70]... do. 
une dove 225. aa cove eee oe ee ese tees oleolonaa lou leeeedoy 
Moose Factory....-.... J- McKenzie ...' |... |-.--|---- Besales ad loesse 0. 36/0, 79). . ..do. 
aces do}. 222282 'C Drexler zaecer: 3.90) .---do. 
Red River Settlement.| R. Kennicott. -.-..}. Fresh, except feet. 
Big Island -<-.-------- Dry. 
cose M0 tj -=s- 5st eee --.do. 
leases On concen ae ee ec eSc\b8 Pals 
-| Fort Resolution ...... J. MeKenzie--2-)....|-2-.|---- 4, 50|1. 25]1. 60)... .|0. 72]. ...do. 
=| Hort Rae... .------ 2 .- IbAGlarkevgessces [sees | wee ees & else tS Bose) Wsec| eae Oh 
hasee GOES Bere Sel een ceases Sotid| jatis-| Lees Pade enlace! Escala ili 
HoaSoH ( EE same or Baer liens peel Sere frme elles ise fceeifosc see cel oce ih 
see dO) veces ace n | ne 0) eae eta | eee eee | eee Bene bees Bee Bee Bea: Cs 
renee Ol. - 2622 see 5Sa| es cdol bene epee Bend bess Pen | oss esl cee] meee | eancit(es 
oeae GOs fee ocnccak| aed Omen eee BA lke Pee ee, [ea] 55 --do. 
ore CTR Aaa Al ice U6 Ba ame [eel nel |e Stabe) no ll EE Sells lye SE 0p 
It appears from the foregoing that the average of this series is nearly 
at the minimum of United States riparius, and that its maximum is at the 
average of ordinary riparius. The average tail (1.32) is below the smallest 
average of any of the United States series of riparius tabulated, while the 
average foot (0.71) is about at the minimum of the latter; only three feet, 
