MABINE BIOLOGICAL STATION ON PUFFIN ISLAND. 37 



'Ciatiis, Danaia duhia, Atylus falcatus, Microprotopus 

 maculatus and Corophiiun honellii. Mr. Walker also reports 

 that in dredging on sand and mud in two and a half 

 fathoms, at Colwyn Bay, in November, he came across a 

 great number of females and one or two immature males 

 of Diastylis hraclyi, and a single adult male of D. spinosa, 

 and he suggests that possibly the so-called immature 

 males of D. hraclyi may really be the females of D. spinosa. 

 The pretty little Amphipod Megaluropus agilis, first 

 described by Dr. Norman only last June, is now found to 

 be not uncommon in Colwyn Bay. Mr. Walker informs 

 me that the collections of Crustacea we have made this 

 year exceed in bulk those of any previous year, and 

 although they are not yet half worked out they have 

 yielded a considerable number of novelties. 



Towards the end of July, Mr. I. C. Thompson, the late 

 Professor W. E. McNab, of Dublin, Mr. E. J. H. Gibson 

 and I were at Puffin Island for a few days. Professor 

 McNab and Mr. Gibson worked partly at the Algae and 

 partly at the land plants; while I occupied myself with 

 further observations on the distribution of the animals 

 over the littoral zone. At this time there were con- 

 siderable numbers of two species of Pycnogonids on the 

 under sides of stones. The one (Nymplion sp.) is of a 

 straw-yellow colour, and is found adhering to Sertularian 

 Zoophytes which are of the same tint; wiiile the other 

 species (Plioxichilus spinosiis) is red and affects Tubularia, 

 and a sea-weed (Chylocladia articulata) having also a dull 

 red tint. 



We have found the following Nudibranchs during the 

 year at Puffin Island: — Boris tubercidata, D. proxima, 

 Goniodoris nodosa, Ancula cristata, Tritonia plebeia, Eolis 

 viridis, and the spawn of Tergipes despecta. No specimens 

 of Bendronohts arborescens have yet been seen, so very 



