Cystophora cristata (Erxleben, 1777). Syst. Regni Anim., 1:590.

TYPE LOCALITY: "Habitat in Groenlandia australiori et Newfoundland". [S Greenland and Newfoundland].

DISTRIBUTION: N Atlantic and Arctic oceans, from Newfoundland (Canada) to S Greenland, Svalbard and Novaya Zemlya (Russia); occasionally south to Portugal and Florida (USA).

SYNONYMS: borealis Nilsson, 1820; dimidiata Riippell, 1842.

COMMENTS: Reviewed by Kovacs and Lavigne (1986, Mammalian Species, 258).