Clare Island Survey. 



42 

 AMPHIPODA. 



By W. M. TATTEESALL, D.Sc. 



Read Jcnh 28. Published August 18, 1913. 



Introduction. 



The area covered by this report is the same as that given by me in the 

 reports on the Schizopoda and Isopoda, namely, from Blacksod Bay in the 

 north to Slyne Head in the south, and seaward to the 50-fathom line. The 

 material on which the report is based is derived from the following 

 sources : — (1) the collections made by the Fisheries Branch of the Depart- 

 ment of Agriculture and Technical Instruction for Ireland during their 

 survey of the harbours of Ballinakill and Bonn and the neighbouring fishing- 

 grounds ; the full results as regards the Amphipoda have not yet been 

 published, but I have abstracted such records from my notes as concern the 

 area now under review ; (2) the collections made by the same Department 

 during the survey of Blacksod Bay ; (3) the collections made specially for 

 this Survey by the Department's cruiser " Helga " and by other naturalists 

 engaged in the Survey, among whom should be mentioned Mr. Kevin H. 

 Foster and Mr. Eobert Welch, who made collections of the semi-terrestrial 

 Amphipoda in the Westport district and on Clare Island. The result is that 

 an enormous quantity of material is available for the purposes of this report ; 

 and the total of ninety-five species here recorded must be considered a fairly 

 exhaustive list of the Amphipoda of the district. 



Very little systematic collecting has been done in the area previous to the 

 making of the collections here dealt with. In 1868 Messrs. Brady and 

 Bobertson spent a week dredging the bays round Clifden, and recorded 

 twenty- two species of Amphipoda. Isolated records have been noted by 

 Walker, Norman, Caiman, Spence Bate, and others from time to time, so 

 that up till now a total of forty-one species of Amphipoda is known from 

 the Clare Island marine area. 



The present report adds a further fifty-four species, nineteen of which 

 are now added to the fauna of Ireland, the remaining thirty-five species being 

 new to the district. 



R.I.A. PROC, VOL. XXXI. A 42 



