li^ The Irish Naluratisi. June, 



The Polyceras were all of the typical form ciirina, warm 

 orange brown iu colour, and the Tritonia was quite immature, 

 only |-inch long, and in colour translucent white. 



The third scrape in the Sound yielded one living specimen 

 each of Doris aspera and Aplysia hybrida, and the fourth, in 

 15 fathoms, brought up a quantity of very fine clean gravel, 

 which produced, along with abundance of dead and living 

 examples of Astarle tria7igjiiaris, dead examples of the fol- 

 lowing interesting species : — 



Rissoa violacea, i. Pecten similis, 2 valves. 



Dentahum tareutiuum, 2 frags. Scrobicularia prismatica, 20 valves. 

 Lima lyOscombi, i frag. Telliua pusilla, 5 valves. 



Of these, Pcdcn similis is new for Dublin and for East Ire- 

 land, and Tellijia ptistlla quite rare. 



To sum up — the results of the Committee's operations for 

 1907 cannot be regarded as disappointing, at least in the 

 department of Mollusca, which, for fully a century, has en- 

 gaged the attention of a series of competent workers. During 

 the 3'ear seven species have been added to the list of Dublin 

 marine mollusca — i.e., Elysia viridis, Actceonia corrugata^ 

 JEolis ccErulaiy ^. tyieolor^ Goniodoris casianca, Pecieji siriatvs^ 

 and p. similis. At the same time, some valuable experience 

 has been gained, along with a general knowledge of the 

 nature and capacit}^ of the various dredging grounds of the 

 county, which may be of service in directing future opera- 

 tions. 



Saudycove, Co. Dublin, 



