SCIURIDAS—ARCTOMYS PRUINOSUS. 929 
TABLE CXL.—WMeasurements of seven skulls of ARCTOMYS PRUINOSUS. 
: Siilte |Seetiees 3 18 
a A lecom lites aS Boilies 
= a eas) See | Spat cata al ies 
i Pal (i= ta ito es Sens hl cree (rest 
a 2 a a a |a Bal os |b S| to = F 
£3) a + S = 2) me) 2 a a = 
a 2 BM eeealt aiaedd aes peck Nicstee ised tele teal te | 
g Lovality: SNe (a Sa Sa Fe See Nie oe“ ates 
a a 4 =) 5 an a =) os 3 22/5 = a 
3 foo Ve Bo devets yy Shes oil Semis (FEN (realmente 
5 8 | @ SU SSE See EPP EES Sete ts} onthe 
3 ray |) se ecedalicret ree fe | rs sire eel ier | eed vata ales 
=] =i = = 3 
2 - 2) 2/2/22] 2) 8 |Sale8| BESS] & we 
ie) il ido) A A A 4 |p i=) ai) =) H 4 
6870 | Washington Territory .-.....--. 4.15 | 2.75 | 1.25 5 | 0.40 | 0.80 | 1.40 | 2.50 | 0.80 | 0.62 | 1.00 | 2.280 | 1.47 
6862) |---.-- OOee cen seccceereaconecce ea: 3.95 | 2.52 | 1.22 | 1.66 | 0.37 | 0.80 | 1.33 | 2.26 | 0.75 | 0.60 | 0.85 | 2.55 | 1.33 
3676 |...--- Gnerer sant sas\ne aaa ot 4.05 | 2.95 | 1.17 #54)/0536))/05:80) 15 3751)2.40) |<. 22 )2-0- 1.00 | 2.65 | 1.34 
3677 | ..---. GU) 2 SasSrocteescinesesSccebe 458.0) | oo aen 1,24 | 1.65 | 0.40 | 0.85 | 1.34 | 2.30 |......]-..... OF 92) aene=| sae 
OTD, | e<n0s = G1) -ceesrocressaco seo nsacae senen 2.50 | 1.25 | 1.58} 0.30 }.-...: Dien see chia || Pee en eee 0.90 | 2.56 | 1.25 
6861 |....-. WUD = srebesiencesodccesspaccss jeaodad scars] rseccs 1.56 | 0.30 |...... BPA OST IESI LS eel -| 0.78 | 2.40 | 1.30 
4750 |.-..-. (0) scecmarnkesecenkesocemces Sb 7 bese. 1.03 | 1.65 | 0:30 ]...... SPT Oi Cy ee a eee 0.77 | 2.35 | 1.35 
TaBLe CXLI.—List of specimens examined of ARCTOMYS PRUINOSUS. 
Bets a 
H a . g 
3 2 rs a 
2 es ee 2 
a A 5 A When z c : a D 
3 3 A Locality. callested: From whom received. Collected by. 
to. | ko Ss a > 
gZsigs| 4 = 
24/34) 2/4 = 
is) o oO ln a 
GHipat | pane tees -| Q-| Fort Good Hope ............-. Oct. —, 1864] C. P. Gaudet ..-..-- C. P. Gaudet --..+.- Skin. 
9493 Fort Henry, Alaska .-.-.--..- May 16,1869} F. Bischoff. .-....-- F. Bischoff .......- aan 00s 
5610 Hortilaiard cess. sees tats on -'-t22)||e = 22 Sascincoe a B. R. Ross..-.-..-----| W.L. Hardisty .... |...do. 
MPN) |) sos] UU SSS | peel ne Sa 0) Spo capes See nce Sane sd PASE pS aesrods || Saseec GUY ence ce cncces| hae see 00 jon sis nota rity 
eee LUNN ence mene C0 menemaclwocecieeveese sa |- == ee eseseee= heen === MO ence acice se alloaces' MO) ence eens --- do. 
HGS |) soso || BSI bere n=s 00 BsospocssesSeesososeell fsecassscesed: | jeseese te saceoee bo A. McKenzie........ ---do. 
S611 |. 5 see 06n al be eal lbceniee GY orceeernecrcos W.L. Hardisty ---.. -.. do. 
aedso4 .| Camp Chiloweyuck, W. T...- | Sept. 18,1458 | A. Campbell ..--.-- | Dr. C. B. R, Kennerly|...do. 
-B5ecr ee ..-.| Frazer's River, W. T..- --] Sept. 18, 1858 ~ad0s= 
Perea eee PHOT MiAndesacesseen asc es aw acchesnn osc > ne --do. 
coool Reeeeel PReeeel Beee Paes G3 eee Sept. 1, 1258 ..do. 
face =| Pesca 259) |S-2.) Hort Yukon .s..---- s-----.---| Dec, 20) 1861 te G0: 
Ssceed| pseocs oat eaae| eeeae sO eee ree cieeee ena - = =~'|| DOC, 20,2001 ---do. 
1173) Fee) Beseee) Bese Camp Chiloweyuck, W. T.....|----.-------- --do. 
asoss| FCs a Saee meee Washington Territory -| Skull. 
hare . do, 
“o5s08 do 
eR. do. 
Leaaee do. 
ae do. 
ieee do. 
ia ee - do. 
. do. 
EXTINCT AMERICAN SCIURIDZ. 
Many species of extinct Rodents have recently been made known by 
Dr. Leidy and Professors Marsh and Cope from the Tertiary deposits of 
59 M 
