Nineteen species of aeolid nudibranchs are here recorded from
the Hawaiian Islands. The natural history and distribution of each species is
described. Morphological accounts of these taxa are provided and their systematic
status is discussed. The status of an additional three species, previously
recorded from the Hawaiian Islands but not encountered in this study, is
reviewed. Based on the study of the Hawaiian aeolidacean nudibranch fauna,
the systematics of the Facelinidae are reviewed. An examination of the zoogeographical
affinities of the Hawaiian aeolid fauna suggests that many taxa
have a typical Indo-West Pacific distribution. However, a significant portion
of the fauna is substantially more widely distributed and appears to be circumtropical
