MARINE BIOLOGICAL STATION AT PORT ERIN. 191 



cause much more friction, i.e., all the edges of the flat 

 particles are exposed to the sand, hut they will, I suppose, 

 act to some extent like the cutting edge of a drill. In 

 going down the worm and tuhe seem always to travel the 

 other wa}', so there is less friction, but evidently much 

 more work. I have not yet quite finished my observa- 

 tions." 



Professor Weiss and his Museum Assistant, Mr. H. 

 Murray, collected Algae at Port Erin during the Easter 

 vacation. Prof. Weiss gives me the following list of 

 species which have not previously been recorded, and are, 

 therefore, new to the locality : — 



Dermocarpa prasina, Born. On Catenella opuntia and 

 L a urenc la pinn a tifida . 



Spirulina tenuissima , Kiitz. Sparingly amongst Bhizo- 

 clonium riparinm. 



Bivularia atra, Roth. In shallow pools of fresh water, 

 near high water line, which would be over-run by the sea 

 at high tide. 



BJiizoclonium riparinm, Harv. 



Urospora speciosa, Holm, et Batt. 



Enter omorplia ramulosa, Hook. 



Balfsia verrucosa, Aresch. 



Callophyllis laciniata, Kiitz. 



Melobesia corallince. 



Litliothamnion coUiculosumJ. rosea, Fosl. Pt. St. Mary. 



Mr. F. W. Keeble, Assistant Lecturer in Botan} 7 in the 

 Owens College, Manchester, occupied the Owens College 

 work table during the summer vacation, and was engaged 

 in work on some physiological problems in the nutrition 

 of red sea- weeds. Mr. Keeble reports as follows : — 



" During my stay of about two months at Port Erin I 

 was engaged in investigating the significance of the red pig- 

 ment of the Florideae, The research, although incomplete, 



