HALIOTIDS IN THE RED-SEA, WITH NEOTYPE DESIGNATION FOR HALIOTIS-UNILATERALIS LAMARCK, 1822 (GASTROPODA, PROSOBRANCHIA)

Two species of Haliotis are known from the Red Sea: H. pustulata cruen ta Reeve, 1846 and H. unilateralis Lamarck, 1822. A neotype is here de signated for Haliotis unilateralis because the specimen in the Lamarck collection of the Museum d'Histoire Naturelle de Geneve (MHNG) is cle arly not the original specimen described by Lamarck, which is not trac eable in the MHNG collections. The neotype, a complete specimen, is de posited in the MHNG. The designated type locality is Gulf of Aqaba: Si nai: flat. The shell is redescribed and radular and epipodial characte rs are compared to those of similar species.