A new polyclad from Brazil

Abstract

During a collecting trip to Cabo Frio (Lat. 22°57' S.; Long. 42°1' W.) in JuLy 1957, subsidized by the National Reseaech Council (Conselho Nacional de Pesqu isas, Rio de Janeiro), I found a triclad-shaped Turbellarian which belongs to the Chromoplanidae Bock (1922, p. 29). The locality of its occurrence is a tide-pool on a very exposed rocky coast, the "práia do Forte". The depth of this Dool is about 1 m at low tide; its water ,vas clean and cool in the \Vinter month when I collected there several times. There were many stones on the bottom of the tide-pool and under one of them the Chromoplanid was found. The biotope contained Paclina, with many Amphipods, and on and under the stones, small sponges (Sycon), Entoprocta (Barentsia cliscreta Busk) , several Polycladida (e. g. species of Psettcloceros and Enchiriclhun) PoLyplacophora, Brachiopods and Echinoder•ms. The species of the Chromoplanidae is new and constitutes the type of a new genus. Clwomyellct) llew gellus. Chromoplanidae with 01':,1, male anel female apertures united; male copulatol'y apparatus constituted by SDel'miducal yesicle, seminal ,-esicle and penial organ; without prostatic vesicle. Type of the gellus: Ohromyella saga) llew species.