1901. _Didelphis yucatanensis cozumelae_ Merriam, Proc. Biol.
Soc. Washington, 14:101, July 19, type from Cozumel Island,
Yucatan.

_Didelphis marsupialis richmondi_ J. A. Allen.

1901. _Didelphis richmondi_ J. A. Allen, Bull. Amer. Mus. Nat.
Hist., 14:175, June 15, type from Greytown, Nicaragua.

1920. _D[idelphis], m[arsupialis], richmondi_, Goldman,
Smithsonian Misc. Coll., 69(5):46, April 24.

_Didelphis marsupialis etensis_ J. A. Allen.

1902. _Didelphis marsupialis etensis_ J. A. Allen, Bull. Amer.
Mus. Nat. Hist., 16:262, August 18, type from Eten, Piura,
Peru.

_Didelphis marsupialis battyi_ Thomas.

1902. _Didelphis marsupialis battyi_ Thomas, Novitates
Zoologicae, 9:137, April 10, type from Coiba Island, Panama.

_Didelphis marsupialis particeps_ Goldman.

1917. _Didelphis marsupialis particeps_ Goldman, Proc. Biol.
Soc. Washington, 30:107, May 23, type from San Miguel Island,
Panama.

_Didelphis marsupialis insularis_ J. A. Allen.

1902. _Didelphis marsupialis insularis_ J. A. Allen, Bull.
Amer. Mus. Nat. Hist., 16:259, August 18, type from Caparo,
Trinidad.

In listing the subspecific names given immediately above we are aware
of the possibility that a thorough study of the geographic variation in
_Didelphis marsupialis_ may contract or expand the list of recognizable
subspecies. We are aware also that Hershkovitz (Fieldiana: Zoology, 31
(No. 47):548, July 10, 1951) has arranged several of the subspecific
names listed immediately above as synonyms of _Didelphis marsupialis
californica_ Bennett. We have not employed his arrangement because he
has not given proof that the currently recognized subspecies are
indistinguishable.

~Caluromys derbianus canus~ (Matschie)

Matschie (Sitzungsberichte der Gesellschaft Naturforschender Freunde zu
Berlin, Jahrgang 1917, p. 284 (for April), September, 1917) applied the
name _Micoureus canus_ to a specimen on which the locality was no more
precise than Nicaragua. Comparison of Matschie's description with
specimens in the United States National Museum (including the holotype
of _Philander centralis_ Hollister and referred specimens of _Philander
laniger pallidus_ Thomas) reveals that Matschie's specimen was
intermediate in coloration between the other two kinds of woolly
opossums named above and t