Pseudomys albocinereus (Gould, 1845) . Proc. Zool. Soc. Lond., 1845:78.

TYPE LOCALITY: Australia, Western Australia, "scrubby plains near Perth" (see Mahoney and Richardson, 1988:171) .

DISTRIBUTION: Australia, SW Western Australia (from Shark Bay area southeast to Israelite Bay); also found on islands of Bernier, Dorre, Shark Bay, and Woody (see map in Watts and Aslin, 1981:196).

SYNONYMS: squalorum.

COMMENTS: Analysis of phallic morphology suggested P. albocinereus belongs in group with P. fumeus and P. shortridgei (Lidicker and Brylski, 1987), but electrophoretic data placed it in a cluster containing P. apodemoides and seven other species, excluding P. fumeus and P. shortridgei (Baverstock et al., 1981) . Dental traits suggested P. albocinereus is closely related to the Pliocene P. vandycki, and if resemblance reflects monophyly, the two species form a distinct group within Pseudomys (Godthelp, 1989) . But Watts (in litt.) wrote that "virtually all data supports close relationships between P. apodemoides and P. albocinereus . Relationships beyond this are any ones guess." See also Watts et al. (1992).