MARINE BIOLOGICAL STATION AT PORT ERIN. 45 



water between the Calf Island and Holyhead, cementing 

 together the dead shells and sand grains of the sea-bottom. 



Mr. A. D. Imms, who eighteen months ago was onr 

 first occupant of the University of Birmingham workplace, 

 has paid a secon'd visit to Port Erin, and has sent in the 

 following brief report upon his work : — 



" Upon the nomination of Professor T. W. Bridge, I 

 was enabled to occupy the University of Birmingham table 

 at the Biological Station for a short period 1 in the middle 

 of August, 1902. My time, as in my previous visit, was 

 devoted in the main to general Biological work. I also, 

 however, gave some attention to marine insects. I have to 

 record the occurrence of Clunio bicolor, Kieif., a Dipteron 

 of the family Ohironomidae, which is new to the fauna of 

 Great Britain. The males were fairly abundant about the 

 surface of the rocks and tide pools at Port Erin, and a 

 few were also observed at Fleshwick. I was fortunate 

 enough to secure a single example of the female, which 

 has hitherto remained quite unknown. In general shape 

 she is vermiform, the legs are very short, the abdomen is 

 bulky and unwieldly, and the wings are completely 

 atrophied. She was taken resting upon the surface film 

 of the water. The Chironomid larvae mentioned in my 

 report for last year almost certainly belong in part to this 

 insect, and in part to a species of Chironomus. Those of 

 the Chironomus, in their younger 'stages, are practically 

 indistinguishable from the larvae of Clunio, and, until I 

 had received adult examples from Mr. Chadwick, I 

 regarded them all as belonging to the latter genus." 



Mr. Imms has also prepared a paper giving a descrip- 

 tion of the Diptera upon which he worked, and this will 

 be read before the Liverpool Biological Society during the 

 present session. 



A large Nemertine worm found at Port Erin was 



