British Land Isopoda. 75 



Porcellio Icevis, Latreille. 



I am not aware that this species has been taken in our 

 islands by anyone since Kinahan procured it in Kent and at 

 Dublin, and writes " common everywhere in moist places, 

 especially in stables and litter, among grass at bottom of 

 walls " ; but Scharff nevertheless speaks of it as a rare species 

 in Ireland, only found as yet in Kinahan's habitat. 



Porcellio pictus, J. F. Brandt. 



Cooper's Hill, near Cheltenham (A. M. N.) ; near Exeter 

 (Parfitt). Between Leith and Portobello (T. Scott) ; Ayr- 

 shire (D. A. Boyd) ; Banff (T. Edward). This species may 

 at once be recognized by its mottled body and black head. 



Porcellio dilatatus, J. F. Brandt. 



Headley, Surrey, and Ventnor, Isle of Wight (Stebbing). 



Cylisticus convexus, De Greer. 



1778. Oniscus convexus. De Geer, Mem. Ins. vol. vii. p. 553, pi. xxxv. 



fig. 11. 

 1853. Porcellio armadilloides, Lereboullet, Mem. Crust. Cloport. de 



Strasbourg-, p. 65, pi. i. fig. 18, pi. iii. figs. 88-94 

 1869. Porcellio armadilloides, Bate and Westwood, vol. ii. p. 485. 



Portland, Dorset; Berkhamsted, Herts (A. M. N.). 

 Salisbury Craggs, Edinburgh ; Lanarkshire ; Rothesay 

 (T. Scott, 5). Under stones in a disused quarry at Leixlip, 

 co. Dublin (Scharff, 6). Kilwinning, Scotland (John Smith, 

 fide Robertson, 4) . 



Armadillidium vulgare, Latreille. 



Probably occurring throughout the British Islands, but 

 more abundant in the south. Dr. Scharff states that it has 

 not yet been found in the west of Ireland. 



Porcellidium nasatum, Budde-Lund. (PI. VI. figs. 5-3.) 



1885. Porcellidium nasatum, Budde-Lund, (8) p. 51. 

 1892. Porcellidium nasatum, Dollfus, (9) p. 10, tig. 12. 

 1895. Porcellidium nasatum, Stebbing, (7) p. 23. 



Body shining, densely and finely punctated, smooth cen- 

 trally; sides with series of depressed, wavy, elongated 

 tubercles, more clearly seen in adult specimens, but may be 



