A SHELL OF FLORIBELLA-ALDRICHI (DALL, 1890), A LARGE SEAHARE (MOLLUSCA, OPISTHOBRANCHIA, APLYSIIDAE) FROM THE NEOGENE OF THE NORTHERN DOMINICAN-REPUBLIC

A single specimen of the aplysiid Floribella aldrichi from the late ea rly to early middle Miocene Baitoa Formation of the Dominican Republic is discussed. So far this rare species is exclusively known from the early Miocene of Florida, the Panama Canal Zone, Cuba and the Dominica n Republic. The size of 150 mm of the specimen is the largest ever rec orded for this species. The systematic position has been changed from Cephalaspidea - Philinidae to Anaspidea - Aplysiidae on the basis of u nique shared conchological features of Dolabella and Floribella.