ys cooperi saturatus_, to which subspecies we refer the
specimens in question.

Howell (_op. cit._:16) referred a specimen from Cassopolis, Michigan, a
locality that might be presumed to fall within the range of the more
recently named _S. c. saturatus_, to _S. c. stonei_. Bole and Moulthrop
did not mention this specimen when they described and named _S. c.
saturatus_ (1942). Neither did Burt, but Cassopolis is within the
geographic range ascribed to _S. c. cooperi_ on his map (The Mammals of
Michigan, Univ. Michigan Press, p. 213, 1946). Examination (by Kelson
and Hall) of the specimen (41777 MCZ) reveals that it resembles _S. c.
cooperi_ in shortness of hind foot (18 mm.), shortness of tail (18
mm.), narrowness across zygomata (16 mm.), and grayish pelage. In the
long braincase, heavy rostrum, greater condylobasilar length, greater
lambdoidal breadth, long rostrum, and longer incisive foramina, it
agrees closely with specimens of _S. c. saturatus_, to which subspecies
we refer the specimen.

Necker and Hatfield (Bull. Chicago Acad. Sci., 6:54, 1941) referred
specimens from Rosiclaire, Illinois, to _S. c. gossii_. These specimens
were not mentioned by Bole and Moulthrop (_op. cit._) when they named
_S. c. saturatus_ although the specimens presumably would be referred
to the newly-named subspecies. We have examined the pertinent specimens
(Nos. 15781-15786 and 16049-16054 CNHM) and find that on the basis of
dark color, long and slender skull, heavy incisors, and small
cheek-teeth, they are referable to _S. c. saturatus_ Bole and
Moulthrop. None, however, has a tail so short as the type of _S. c.
saturatus_. For that matter, the average length of the tail of six near
topotypes (5 mi. W, 2-1/2 mi. S Monticello, Piatt County, Illinois,
Nos. 32037-32042 KU) exceeds that of the type (17.4 mm., range 12-20,
as compared to 14 mm. for the type).

Synaptomys cooperi gossii (Coues)

1877. _Arvicola (Synaptomys) gossii_ Coues, Monogr. N. Amer.
Rodentia, p. 235 (published as a synonym of _Synaptomys cooperi_,
but name stated to apply to Kansan specimens of which description
and measurements are on p. 236), type from Neosho Falls, Woodson
County, Kansas.

1897. _Synaptomys cooperi gossii_, Rhoads, Proc. Acad. Nat. Sci.
Philadelphia, 49:307, June.

In view of the taxonomic treatment accorded by Bole and Moulthrop (Sci.
Publs. Cleveland Mus. Nat. Hist, 5:149-151, September 11, 1942) to the
lem