42 2 Proceedings of the Royal Irish Academy. 



I have seen all the species previously recorded except Phoxocephalus 

 holbolli recorded from Ardbear Bay by Brady and Bobertson, and Gammarus 

 campylops noted from Newport, Co. Mayo, by Norman. The former I 

 suspect to be either Metaphoxus fultoni or M. pectinatus, both comparatively 

 common in the district ; and the latter, as pointed out by TValker, will 

 probably prove to be only a form of Gammarus locusta. The Aniphipoda 

 are normally creatures of bottom-haunting habits, and a large part of the 

 material has been captured by means of a dredge or by shore-collecting. 

 But tow-netting in the harbours and shallow waters of the district at the 

 surface at night has yielded excellent results. A great number of Amphipoda 

 become pelagic during the hours of darkness, and can then be caught in 

 immense numbers. In this way a better idea can be obtained of the relative 

 abundance of the various species in the district than would be got by a 

 considerable amount of shore-collecting and dredging. 



I have already published a paper on the pelagic Amphipoda of Ireland, 

 and have abstracted from it the records which concern the area under review. 

 In the course of the examination of the collections of the Amphipoda I have 

 come across a few additional Isopoda. No species of the latter occurred that 

 had not been previously recorded ; but the following species were noted from 

 new localities within the area, and may, perhaps, be fittingly placed on record 

 here : — 



Paratanais batei, G. 0. Sara. — 2\ miles E. of Clare Island light, 

 22 fathoms, one. 



Gnathic, oxyuraea (Lilljeborg). — Inishgowla Harbour, Clew Bay, 4 fathoms, 

 one. 



Munna krbyeri, Boeck. — Inishlyre Boads. 4 fathoms, one. 



The arrangement and nomenclature of the Gammaridea here followed are 

 those of Stebbing, " Das Tierreich." 



Systematic List. 



AMPHIPODA GAMMARIDEA. 



Family LYSIANASSIDAE. 



Nannonyx goesii Boeck). 



Elly Bay, Blacksod Bay, shore, one ; 2 f aths., one. 

 New to Ireland. 



Distribution : — Arctic Ocean, X. Atlantic from Norway to the English 

 Channel, West Norway. 



