The geographical distribution of Holothuria (Cystipus) pseudofossor, Stylocidaris lineata, Clypeaster (Clypeaster) rosaceus Chaetaster longipes Luidia barbadensis, Amphiura princeps, Ophiophragmus pulcher and Amphipholizona delicata is extended to the Brazilian region. Cladodactyla croces and Pseudocnus perrieri were collected in the region near Mar del Plata (Argentina) and Pseudoonus dubiosus and Chiridota marenzelleri , in front of Uruguay.