RODENTIA—GEOMYINAE—THOMOMYS DOUGLASSII. 395 
Anteriorly the ashy tint prevails, and there is no visible patch of white as in the last; what 
there is of this color being confined to the bottom of the pouch instead of coming up to the edge. 
The tail is thicker at the base than in the last mentioned species ; the claws are much stouter, 
larger, and more curved, but the palms themselves are decidedly shorter, with the first and fifth 
fingers smaller, especially the first ; a similar relation exists in the hind feet, which are shorter, 
but the claws longer in the present species. The incisors are deeper orange, flatter anteriorly, 
and the groove sharper and more distinct. 
Measurements. 
275. 355. 452. 
i | 
Inches. Lines || Inches. Lines. Inches. Lines. 
BUG G7 ieee eee ere eo Seen me EE esos LOE obi |(terececons ee || secre: ae 6 
7820) 0) Bi 0d ES ie pe re ee Re | is Reed eee eae + 6 3 9 
Tail, from root to end of vertebra -...---------- 2 1 1 5 1 7 
from root to end of hairs.-....------.----- 2 2 1 6 1 8 
MN GoVELeOs POLON = =~ ane mae eae eae 1 9 1 5 1 5 
Ears, height internally above skull---.------.---|----.----- iy | ee ae iW Wise Setecale eth gees 
i UE SR es Fy eg ee Af Ee 23 eee ae | aerate ae |e a a ol 
Anny forefoot to\end of claws. :.<> 24.5 bese. 2 <|ecens-4--5 113 eee 10 eee 8 
longest claw, (above) Se eee eee | ee ee 5} pons ED Oe | See ee Se 33 
DOU Pert Cha We unt LOC) en fr 63 tees Fs TESS. 8 4} 
Leg, hind foot from heel to end of claws -------- 1 14 / eee ee as D4 snl /aSocees 8 10 
LON PERG ClaW = noe =< = oan ce een es accleaanweee as 2} [enna nna Ze eens See 1} 
USL U0 1 ea id A ce RE RS a |e at ll ee | L 2 1 1} 
No. 452, from Fort Dalles, is much the smallest of the three above referred to, and may 
possibly belong to another species. It differs in having the hair rather longer, and the under 
parts considerably lighter. There is no appreciable difference between the colors of the check 
pouches and the region surrounding them. 
Compared with 7’. wmbrinus, this species has a-rather shorter tail, stouter claw, but shorter 
palm, &c. In distribution of coloration, the differences are as much as between it and 7’. bul- 
bivorus. : 
A gopher, collected by Dr. Newberry, at Canoe creek, California, has the claws of Z. 
douglassii, but the under parts are dirty white; the feet and tail clearer. This agrees some- 
what with the specimens in the Philadelphia Academy, labelled @. borealis, and brought from 
Oregon by Townsend. If this be a distinct species, Dr. Newberry’s specimen may probably 
belong to it. 
No. 1962 resembles 7. bulbivorus much more in color than 7. donglassii. The large and 
much compressed fore claws, however, belong to the latter species. é 
