I9IO- Foster AND TatT3RvSAIx- — Isopoda and Amphipoda. 187 



ISOPODA TKRRESTRIA. 



BY NKVIN H. FOSTER, M.B.O.U. 



The Woodlice collected b}^ members during tlie Conference 

 Week have been submitted to me, and I have to thank Mr. 

 D. R. Pack-Beresford, who kindly assisted me in the examina- 

 tion of some of the more critical species. There are seven 

 species, two of them new records for Donegal West. 

 Ligria ocean lea, Ivinn. — Tory Island. 



Trichoniscus pusillus, Brandt. — Bunliu ; Doe Castle ; Rosguill : 

 Glenveagh ; Tory Island 



Trichoniscus pygmaeus, Sars,— Doe Castle: Bunlin ; Tory Island. 

 This minute species had not previously been recorded for Donegal 

 West, though it now seems probable that it has an extended Irish 

 distribution ; as, since its first discovery in Ireland two years ago, it 

 has been found in 10 counties. 



Haplopthalmus Mengrii, Zaddach. — The capture of three specimens 

 of this peculiarly marked Woodlouse by Mr. A. W. Stelfox at Doe 

 Castle, is the most interesting discovery in this group. Canon 

 Norman and Mr. W. F. de V. Kane found this species in Co. Clare in 

 1900 (this being the first Britannic record), and last year it was taken 

 in Dublin, Leitrim, and Donegal East. 



Philoscia muscorum, Scopoli.— Bunlin ; Tory Island, a few. 



Oniscus asellus, Linn. — Doe Castle; Glenveagh; Bunlin; Rough 

 Island ; Melmore ; Tory Island ; Baruesbeg. The specimens of this 

 species from Tory Island are remarkable for their bright coloration, 

 in this respect resembling those observed during the Cork Conference, 

 Many of the specimens are of the "butter-scotch '" colour, and some 

 of them possess bright reddish-orange markings, others being light 

 yellow. Most of the specimens are of unusually large size. 



PorccIIio scabcr, Latreille. — Melmore; Doe Castle; Tory Island. 

 Like the previous species some of these from Tory Island are brightly 

 coloured. In many specimens the side plates of the mesosome are 

 tawny, and in some instances the dorsal face is more or less marked 

 with patches of yellow or orange. 



Hillsborough, Co. Down. 



MARINE AMPHIPODA AND IvSOPODA. 



BY WILLIAM TATTERSALL, M.SC. 

 Orchestia littorea, Leach.— Tory Island, Horn Head. 

 O. meditcrranca, Costa.— Horn Head. 

 Cammarus mar m us, Leach. — Tory Island. 

 Talitrus locusta, L.— Tory Island, Horn Head. 

 Idotea baltlca, Pallas. — Tory Island. 



Manchester Museum. 



