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186 



MONOGRAPHS OK NORTH AMERICAN RODENTIA. 



mngnis, paululum vellere cxstantibi n ; xuprd Julvo-badius, intimh nigra permix- 

 tus, infra c griseo-brunneo albescens. 



IIahitat. — Oregon and Washington Territories (Columbitt River, July 

 21, 18iJ5, Toimsend; the type. Puget Sound and Shonlwnter Buy, Cooper 

 and Suckleij. Cascade Mountains, Newberry). 



One of the larger meadow mice, 5 or 6 inches long, head 1^, tail 2}, 

 hind foot 1, fore foot nearly j, ears nearly f high and as much or more wide, 

 l)rojecting a little from the fur; color above blended yellowish-brown and 

 black ; below whitish, shaded with grayish-brown. 



Table HlMll.—ittannmaiU of etgklten tpeeiment of A. townhkxdi, Mh drg and aloohoHe. 



* MeunreDients onpie*! from Buoklry, op. eit, ; ■peclmen not Been. 



t This speoimen (since skinned oat of alcohol) U About the loiigest-titiled American Artficola wc 6T«r ww and bu 

 given as some anxiety. It is small for toummndii, with feot at a minimum and Ucklo;; a peculiar rolmstnew Ihoae of fMm> 

 wndti fienernlly show ; the pat likewise Is remarkftbly small. But wo can make no other dlspoattloD of the speoimen. 



NoTK.— As will be seen from the flf^ares. the Columbia Btver aeries, some of which, at least, appear ftill f(rowD, are 

 not lRrK<>r than ordinary nparuu, and it Is mainly on aoconnt of the icfeat oomparatlTc lenfftb of the tall that we awaign them 

 here. Tbey offer n gentle transition Into ordtoary ripariwi. No. I87S, as elsewhere noted, is still moro donbtfal ; it has the 

 tail as short as is asaal in Hpariut, but the feet beyond the |ti*«liftBffi of ordinary ripariuf— exactly the roTerae conditions of 

 the Columbia River series. 



Description (of No. tA^). — In form, this animal does not differ from 

 other species of this section of the genus; nearly the usual relative propor- 

 tions *)f head, body, tail, and feet being exhibited. The tail, however, will 

 certainly average longer than in riparius; for in specimens no larger than the 

 latter, the tail averages at or beyond a maximum of riparius. This length 



