450 ONISCIDA. 
ISOPODA. ONISCIDA. 
NORMALIA. 





PHILOSCIA MUSCORUM. 
Specific character. Smooth, shining; front of the cephalon slightly 
arched in the middle. Terminal segment of the pleon broadly triangular, 
apex acuminated, sides straight. Uropoda with the outer division falciform ; 
the inner lobe scarcely more than half the length of the latter. 
Length, one-fourth to one-third of an inch. 
Oniscus muscorum. Scopout, Entom. Carniol. p. 1145. Cuvier, in Journ. 
d’Hist. Nat. i. t. 26, f. 6, 7. Cogumpnrt, Illust. 
Iconog. t. 6, f. 12. 
Philoscia muscorum.  Latreinin, Hist. Crust. et Ins. vii. p. 43. Gen. 
Crust. et Ins. i. p. 69. Leacu, Trans. Linn. Soc. 
xi. p. 375. Edin. Ene. vii. p. 406. Suppl. Ene. 
Brit. i.p.428. Samovetis, Ent. Compend. p. 111. 
Kinawan, Nat. Hist. Rev. v. 4, 1857, p. 280, 
pl. xx. figs. 1-6; v. 5, 1858, pp. 194, 195, pl. xxi. 
f. 4. Wurtz, B. M. Cat. Brit. Crust. p. 72. Pop. 
Hist. Brit. Crust. p. 235. (Not the P. muscorwm 
of Lereboullet, which is an Oniscus.) 
Oniscus sylvestris. Fapricius, Ent. Syst. ii. p. 397. 
Ligia melanocephala. Kocu, in Herrick-Schaffer Contin. of Panzer Ins. 
Deutsch]. 162, 18; zbid. Deutschl. Crust. 22, 18. 
Zia melanocephala. Ibid. sub. Ins. D. 180, 1, and D. Crust. 40, 1. 
