140 Proceedings of the Royal Physical Society. 



Genus (24) Philoscia, Latreille, 1804. 



34. Philoscia muscorum (Scopoli). 



1763. Oniscus muscorum, Scopoli, Entomologia Carniolica, p. 415. 



Habitat. — Under stones, among dead leaves, etc ; common, 

 and generally distributed. 



Genus (25) Platyarthrus, Brandt, 1833. 



35. Platyarthrus Hoffmannseggi, Brandt. 



1833. Platyarthrus Hoffmannseggi, Brandt, Consp. Monogr. Crust. 



Onisc, p. 12, pi. iv. fig. 10. 

 1900, ,, ,, W. Evans, Ann. Scot. Nat. 



Hist. (July 1900), p. 186. 



Habitat. — Near Inverkeithing, Fifeshire, " in nests of the 

 common ashy-black ant, Formica ftisca " (W. Evans, Edin- 

 burgh). The only other Scottish record for this curious 

 species is that by Thomas Edward, of Banff, in the list of 

 Crustacea in Smiles' Life of Edward. 



Genus (26) Porcellio, Latreille, 1804. 



36. Porcellio scaber, Latreille. 



1804. Porcellio scaber, Latr., Hist. Nat. Generale et particuliere des 

 Crust, et des Insectes, vol. vii. p. 45. 



Habitat. — Under stones, old wood, etc., everywhere. 



37. Porcellio pictus, Brandt. 



1830. Porcellio pictus, Brandt and Ratzeburg, Medicin. zoologie, 



vol. ii. p. 78, pi. xii. fig. 5. 



1891. ., ,, T. Scott, Proc. Roy. Phys. Soc. Edin., 



vol. xi. p. 78. 



Habitat. — At the foot of a wall near Seaheld, Leith, April 



1888 ; apparently rare. Taken under a stone near Dunbar 



in 1904 (W. Evans). 



Genus (27) Cylisticus, Schnitzler, 1853. 



38. Cylisticus convexus (De Geer). 



1778. Oniscus convexus, De Geer, Mem. pour Servir a l'hist. des 



Ins., vol. vii. p. 563, pi. xxxv. fig. 11. 

 1891. Porcellio armadilloicles, T. Scott, Proc. Roy. Phys. Soc. 



Edin., vol. xi. p. 79. 



Habitat. — Under stones at the foot of Salisbury Crags, 



