44 2 Proceedings of the Royal Irish Academy. 



HaplopMludmus mengii and Triclwniscus pygmaeus may also prove resident 

 there, as in the case of the former species the general experience is that 

 wherever found in this country it is only in very small numbers (except in 

 greenhouses, where it often occurs in considerable colonies), and its 

 minuteness renders it easily overlooked ; but the latter species, though so 

 diminutive, is readily recognized in the field, and, though the special attention 

 of Mr. Stelfox and myself was directed to its discovery, we failed to find it 

 either on the island or the adjoining mainland. This is rather surprising, as 

 we have succeeded in finding it in every other Irish county in which we have 

 searched for it. H. mengii and T. pygmaeus have recently been taken 

 (A. W. S.) at Manulla Junction in Mayo East, only some few miles from the 

 boundary line between the western and eastern divisions of the county. 



For assistance in collecting specimens of woodlice in the district I have 

 to tender thanks to Dr. Scharff (referred to below as K.F.S.), Eev. Canon Lett 

 (H.W.L.), Eev. W. F. Johnson (W. F. J.), Messrs. D. E. Pack Beresford 

 (D. E. P. B.), J. N. Halbert (J.N.E.), E. LI. Praeger (E. LI. P.), A. W. Stelfox 

 (A. W. S.), E. J. Welch (B. J. W.), and numerous other collectors who 

 materially aided me in the survey of this group. 



The following notes on the various species found on Clare Island are 

 appended : — 



Ligia oceanica (Linn.). 



This species is common in suitable situations all round the shore-line of 

 Clare Island, as well as on the shores of Clew Bay and its islands. It has 

 also been taken on Mweelaun Eocks. Those observed in this district were 

 mainly of small size, rarely exceeding 25 mm. in length, and usually very 

 dark (almost black) in colour, but a specimen found at Belclare on the 

 southern shore of Clew Bay was of a brick-red colour. 



Trichoniscus pusillus Brandt. 



In damp situations this little species was met with everywhere in con- 

 siderable numbers. It is not confined to low-lying situations, having been 

 taken on the face of the Croaghmore cliffs at an altitude of 1,300 feet. A few 

 specimens of the violet-coloured variety were observed. 



Trichoniscoides albidus (Budde-Lund). 



When examined in life under a lens this small species is easily recognized. Its 

 colour is white, but its bright pink eyes and the pink ramifications on the dorsal 

 surface are distinctive characteristics, which, however, immediately disappear 

 on the specimen being put into spirit. Two specimens were taken (E. LI. P. 

 and N. H. F.) under a deeply embedded stone (which also covered the nest of an 



