EASTERN MEDITERRANEAN OPISTHOBRANCHIA: RUNCINIDAE (RUNCINACEA), WITH A REVIEW OF RUNCINID CLASSIFICATION AND A DESCRIPTION OF A NEW SPECIES FROM FIJI

An account is given of the runcinaceans Runcina adriatica, R.brenkoae and R. zavodniki collected on diving expeditions inthe northern Adriatic Sea. The new data permit a clear separationof these from other runcinaceans of the north Atlantic Ocean.Several diagnostic features of the radulae and the oral cuticu-lararmature are corrected or amplified. Dental metamorphoses aredescribed for R. adriadca and R. zavodniki. The world's runcinaceanfamilies, genera and species are reviewed, and Runcina fijiensisn.sp. is described from the Pacific island of Viti Levu, Fiji (Received 14 December 1987; accepted 7 January 1988)