MARINE BIOLOGICAL STATION AT PORT ERIN. 17 



the occurrence of this Nemertean worm in the Port Erin 

 district, or of its occurrence in these two molluscs, though 

 Mr. Johnstone tells me he has found it in Mya truncata 

 at Piel. It is probably not restricted to these three species. 



" An interesting ciliate Infusorian, Licnophora 

 auerbachii, which is also, I believe, a new record for the 

 district, turned up on the tentacles of Peeten maximus. 



" I should like to thank Professor Herdman, and 

 also Mr. Chadwick, for the space allotted to me in the 

 laboratory, which exceeded, I am afraid, very consider- 

 ably the normal bounds, and for all the trouble they have 

 taken to facilitate my work in various ways." 



Mr. GIravely's Report. 



" The stormy weather this summer interfered con- 

 siderably with work on pelagic larvae. For it was found 

 that healthy specimens disappeared from the plankton 

 during a storm, and did not return until almost all the 

 sand which was stirred up had settled down again— a 

 process which always took several days to complete. The 

 only larva which I have to record as new to the bay ie 

 ' Ophiopluteus compressus,' of the ' Nordisches Plankton,' 

 a single specimen of which was taken on July 22nd. As 

 tin's presents a mode of development not hitherto recorded 

 in ( )|)liiuroids, a description of it may be of some interest. 

 The Imlroccel is situated on the left of the alimentary 

 canal, ;md extends forwards slightly beyond the mouth, 

 which would be perfectly symmetrical if it were not 

 slightly drawn out into a point on the left side. The pari 

 of the Imlroccel near the mouth, however, will not 

 eventually surround it, for it already bears ai least two 

 pairs of developing tube-feet : and (from the presence and 

 position of similar papillae on other parts- of the larva, and 

 of certain small plates that appear to be developed in 



