166 TRANSACTIONS LIVEEPOOL BIOLOCICAL SOCIETY. 



Family Vobticidjs. 



Provortex balticus (Schultze). 



Common in tide-pools at Port Erin. A large proportion 

 of those examined had ripe eggs in their uteri. A variety 

 without the usual brown pigment was found along with 

 normally coloured individuals among Cladophora. 



Provortex affinis (Jensen). 



New to L.M.B.C. District. 



One example, among Cladophora in a tide-pool near the 

 station. This species is easily distinguishable from P. 

 balticus by the form of its penis, the distal part of the 

 chitinous tube bending at an angle to the proximal part 

 and bearing a leaf-like triangular plate. 



Fecampia erythrocephala, Giard. 



Gamble gives Port Erin as a locality for this parasitic 

 form in the Cambridge Natural History, vol. ii., p. 50, 

 although at the time of his publishing his paper in these 

 " Transactions " he had not met with it. 



I found numerous " cocoons " of this species under 

 stones between tide-marks, but I failed to find the worm 

 itself in any of the Carcini that I examined. 



Graffilla buccinicola, n. sp. (PL V., figs. 3 to 6 ; PI. VI., 

 figs. 7 to 13). 



The above name I propose to give to a parasite from 

 the kidney of Buccinum undatum and Fusus antiquus, 

 which I found infesting these two molluscs in considerable 

 numbers. The genus Gi'affilla, von Jhering (8), was 

 established to receive a species found in the kidney of 

 Murex, which v. Jhering called Graffilla muricicola. To 

 the same genus a parasite discovered by Lang (9) was 

 referred by v. Graff (Monographic, p. 375) who called it 

 G. tethydicola. V. Graff also refers the Anoplodium my till 

 of Levinsen (10) to this genus. Finally a fourth species 

 was described by Dr. Ferdinand Schmidt (Archiv, fur 



