RIJKS MUSEUM VAN NATUURLIJKE HISTORIE — LEIDEN. 65 



epitocous form has the eyes strongly enlarged and on each side of the 

 head they lie next to each other. The longest of the tentacular cirri 

 reaches to the 14th segment. The dorsal cirri of the anterior 7 parapodia 

 are elongated and thickened, whereas the ventral cirri show this charac- 

 ter only in the anterior 4 segments. 



Platyn. striata has been identified by Augener ') with Platyn. austra- 

 lis from Australia and New Zealand; however in my opinion this is 

 somewhat dubious. For the epitocous specimen, described by Schmarda, 

 has been examined anew by Ehlers and this author has stated, that the 

 transformation of the parapodia only commences at the 30th parapodium, 

 whereas in Platyn. striata this occurs already at the 15th one. Ehlers 

 has also given an accurate description and figures of the atocous form 

 of this species, from which it may be concluded that indeed there is a 

 great agreement between Platyn. striata and — australis with regard to 

 the structure of the parapodia as well as the shape of the bristles ; the 

 armature of the proboscis however appears not to be the same, as Platyn. 

 australis lacks also group II of the paragnathi and sometimes group III. 

 This question can only be settled by the investigation of a large material 

 from different parts of the world. 



Nereis {Perlnereis) variegata Gr. 



{jrube, Annulata Orstediana, Naturh. Foren. Yidensk. Meddelelser, 

 1857, p. 7. 



Ehlers, Die Polychaeten des Magellan, u. Chilenischen Strandes, 1901, 

 p. 112, PI. XIV, figs. 1—21. 



Mc Intosh, Marine Investigat. in South Africa, Polychaeta,' 1903, 

 p. 37, PI. I, figs. 6—10, PI. II, figs. 11 and 12. 



Seven small specimens were collected at Seapoint near low water- 

 mark; only three of them have the proboscis everted and they possess 

 on group VI of the basal region a transversely elongated tooth, with a 

 rather sharp edge, whereas ventrally group VII and VIII consist of a 

 distichous belt of paragnathi, ending at each side in a single row. 

 According to Ehlers, who made a careful revision of specimens from 

 various parts of the world, Nereis variegata is a widely distributed species, 

 found at the Cape as well as on the West- and East-coast of South- America. 



? Nereis (Neanthes) operta (Stps.). 



Among the specimens of JV. striata I met with a worm, that though 

 resembling somewhat this species in coloration, differs from it by the 



1) Fauna Siidwest-Atisti-aliens, Polychaeta errantia, 1913, p. 182. 



(36-111— 191b) 



