MARINE BIOLOGICAL STATION AT PORT ERIN. 35 



time it may perhaps be of interest to state that, by- 

 establishing a colony of these annelids in my aquarium, I 

 have been enabled to ascertain their method of reproduc- 

 tion, and to obtain the larval form. This proves to be 

 Mitraria, the parentage of which was, I believe, previously 

 unknown." 



The Rev. T. S. Lea has continued his interesting work 

 on the preparation of photographic records of the habitats 

 and appearance of the littoral plants and animals under 

 natural conditions, either when exposed at low tide or 

 when actually under water. He has produced a most 

 beautiful series of plates showing sea-anemones expanded 

 in shore pools, in some cases catching and swallowing 

 food. Last year Mr. Lea photographed (half-plate size) 

 a marked area of rock covered with adhering animals, 

 This year he has taken the same area, on the same scale, 

 and finds (see fig. 4) that the population has changed 

 almost entirely. All last year's limpets are gone, leaving 

 their scars on the rock ; a few of the barnacles seem to 

 be the same individuals. Many thousands of new animals 

 have appeared. 



Miss L. R. Thornely has found on material from 

 Port Erin the following interesting Polyzoa new to our 

 district : — Mucronella peachii, var. labiosa, previously 

 known from Belfast and Guernsey ; and Mucronella 

 abyssicola, on a shell, previously known only from 

 Shetland. 



Dr. G. W. Chaster informs me that from material 

 dredged in our district by the Fisheries steamer he has 

 obtained the mollusca Eulima intermedia (alive and very 



