ISOPODA. 4();5 



Genus PoRCELLIO. 



p. scaher, Latr. 

 " Common under stones, wood, and in old walls." Templeton MSS. 



P. leBvis, Latr. 

 " Rare ; I have only seen one specimen." Templeton. 



Genus Armadillium. 

 A. vulgarc, Edw. 



J. V. Thompson, catalogue. " Inhabits among stones and moss." 

 Templeton. 



Genus Praniza. 



P. cceruJata, Mont, (sp.) ? 



A letter from A. H. Haliday, Esq., dated October 9th, 1847, conveyed 

 the following information : — " I found a species of Praniza pretty com- 

 mon on the clayey shores of Strangford Lough last week, in company 

 with Anceus maxillaris. They were in small cavities on the surface of the 

 clay under stones, sometimes singly, oftener two or even three and four in 

 each hole ; the smaller slender green ones were few in comparison. You 

 will find some of the new-born young with them, having all the charac- 

 teristic form of the parent, but the posterior thoracic segments not so 

 completely confounded together. I have given but a hasty look at them, 

 but have not recognised males among the adults." 



Along M'ith Crustacea since received from Dr. Ball, were sent spe- 

 cimens of a Praniza, purchased of Mr. M'Calla as collected on the Irish 

 coast, but no locality is given. They were obtained previous to those 

 first noticed. 



M. Edw., vol. iii. 195, remarks that the male is found on the rocks of 

 the coast of La Manche and England, and the female appears to live 

 habitually fixed to the branchia of various fishes ; I have never seen them 

 on deep-water fishes, though they may infest the littoral species, as 

 Father-lasher, &c. 



Genus Anceus. 



A. maxillaris, Lann. 



I obtained specimens dredged M'ith Modiola riil(jaris at Bangor in 

 Sept., 1835, one from the rejectamenta brought with lobsters from Glen- 

 arm, Dec, 1843, and tAvo or three brought with oysters from Stranraer 

 (Scotland), also on oysters from Bangor, Down. 



Genus Sphceroma. 

 S. scrratum, Leach. 

 River Lagan and Strangford Lough, W. T. 



8. Hookeri, Leach. 



South of Ireland. J. V. Thompson. 



S. rar/icauda, Leach. • 



North of Ireland, W. T. 



2 n 2 



