166 Proceedings of the Royal Irish Academy. 



collected by them ; had it not been for the help thus received, our lists 

 would have been far from complete for some of the species. We have to 

 record our thanks in this respect to the following: — Miss Agnew, Charles 

 Anderson, Capt. H. Pack Beresford, E. J. Pack Beresford, Eev. E. Boyle, 



D. C. Campbell, the late John Cottney, Miss Cuffey, Miss M. J. Delap, 

 F. J. Devlin, Dr. George Fogerty, Mrs. Foster, Miss Foster, S. A. Gordon, 

 Eev. John Going, J. N. Halbert, S. Henry, Eev. W. F. Johnson, H. Wallis 

 Kew, S. K. Kirker, Eev. Canon Lett, Mrs. Millar, J. N. Milne, Miss Mitchell, 

 John McCandless, Dr. McCann, E. L. L. McChntoek, Miss McDonnell, 

 T. J. McElderry, Dr. J. L. Nevin, H. L. Orr, Eobert Patterson, W. H. Patterson, 



E. A. Phillips, E. LI. Praeger, Mrs. Eevington, Dr. E. F. Scharff, Eev. W. S. 

 Smith, E. Southern, A. W. Stelfox, Miss Stewart, N. E. Stephens, W. E. Stitt, 

 J. Swain, Dr. Trumbull, P. A. Ussher, Eowlaud Wade, E. Welch, Miss 

 Westropp, T. J. Westropp, and W. C. Wright. 



The number of species now known in Ireland is twenty-five, being an 

 addition of seven to the list published by Dr. Scharff in 1894. Of these no 

 less than twenty-four have been found in Co. Dublin ; two of them (Meto- 

 ponorthus melanums and Ehima purjmrascens) have not been discovered 

 elsewhere in the Britannic area, and one (Philoscia couchii) is apparently 

 confined in England to Devon and Cornwall. These remnants of the Lusi- 

 tanian fauna were found at Howth, though it is possible that careful search 

 in some of the south-western counties may also reveal their presence there. 



Three only of our species need be regarded as ai'tificially introduced, 

 viz. : Triclioniscus steblingi, only found in a very hot house in Glasnevin 

 Gardens, Dublin ; Armadillicliiom nascdum, found only in houses kept at stove 

 heat ; and Metoponorthus pruinosus, which we find chiefly in greenhouses or in 

 the gardens adjoinmg them. Ligia oceanica is common all round the coast 

 where the shore affords suitable habitat, and it also penetrates up tidal rivers, 

 so that we are able to record it even in the non-maritime county of Armagh. 

 Triclioniscus pygmaeu,s will probably be found "eventually to have an extended 

 range, as this species, first discovered in Ireland in 1908, has since been 

 found in every coimty in which opportunity has been afforded for a careful 

 search ; its small size doubtless accounting for the fact of its having so 

 long been overlooked. It is also possible that Haplophthalmus mengii may 

 also prove though not common, at least widely distributed in the vicinity 

 of the coast-line, all our records for this species being coastal, with the 

 exception of three, two of them being about one mile, and one eight miles, from 

 the shore. Perhaps the most interesting result of our inquiries into the 

 distribution of Woodlice occurs in the case of Armadillidium vulgare. This 

 species, which is so common in the south-east of Ireland, seems to be entirely 



