MARINE BIOLOGICAL STATION AT PORT ERIN. 193 



" The species recorded are the following, those new to 

 the district being marked with an asterisk(*) : — 



" * Polycelis nigra (O.F.M.) [in fresh-water] ; Aphanas- 

 toma diver sicolor, Oe. ; Convoluta paradoxa, Oe. ; Pro- 

 mesostoma marmoratum (Schultze) ; P. solea (0. Schm.) ; 

 *P. agile (Levinsen) ; Byrsophlebs intermedia, v. Grff. ; 

 Proxenetes flabellifer, Jensen; *Mesostoma neapolitana, 

 v. Gr.; Pseudorhynchus bifidus (M-Intosh) ; Acrorhynchus 

 caledonicus, Claparede ; Macrorhynclius ndgelii (K611.) ; 

 *M. croceus, Fab.; M. keligolandicus, Metschnikoff ; 

 Provortex balticus (Schultz); *P. affinis (Jensen); Fecampia 

 erytJirocephala, Giard ; *GraffiUa buccinicola , n. sp. ; 

 *Plagiostoma koreni, Jensen ; P. vittatum, Frey and 

 Leuck. ; Vorticeros auriculatum (O.F.M.) ; Gylindrostoma 

 quadrioculatum (Leuck.); Monotusfuscus, Oe.; M. lineatus 

 (O.F.M.); Stylochoplana maculata (Quatref.); Leptoplana 

 tremellaris, O.F.M. ; Cycloporus papillosus, Lang, var. 

 kevigatus, Lang. 



11 The occurrence of Mesostoma neapolitana is of interest, 

 it has hitherto only been found at Plymouth and at 

 Naples. Only the cocoons of Fecampia erythrocephala 

 were found. I have since found this worm in more than 

 one locality on the Irish Coast. 



" Besides identifying these species I have commented 

 in my report upon certain anatomical characters in various 

 of them, and have recorded one or two interesting varie- 

 ties. I have also endeavoured to determine the relative 

 abundance of the different species that came under my 

 notice. 



" T also describe a new species, which I refer to the 

 genus Graffilla, v. Jhering, under the name of GraftiUa 

 buccinicola. It was found in the kidney of Buccinum 

 undatum and Fusus antiquus. This species differs from 

 the other members of the genus in the form of the body, 



