CRUSTACEA. 45 



ARTHROSTRACA. ISOPODA. 



MUNNOPSIDAE. 



135. Ilyarachna, species, Harger. 



Ihjarachna species, Harger, Rept. U. S. commr. of fish & 

 fisheries, pt. 6, for 1878 (1880), p. 335. "106 fathoms, gray 

 MUD, 21 :miles east of cape cod light." 



Perhaps I. hirticeps G. (). 8ars. 



Mass. — 21 miles east of Cape Cod Light, 106 fathoms. 



ONISCIDAE. 

 So-w-bugs : Pill-bugs ; Wood-lice. 



136. Oniscus asellus Linne. 



Onisais asellus Linne, Syst. nat., ed. 10, 1758, vol. 1, p. 

 637. "Habitat in Domiuus, Mueis, Hybernaculis, lignis 

 putridis." 



Oniscus 7nurarius Ciivier, Joiirn. hist, nat., Paris, 1792, vol. 2 

 p. 22, pi. 26, figs. 11-13. 



Me. — P'reeport. 

 Mass. — Woods Hole. 

 R. I. — Providence. 



137. Philoscia vittata Say. 



Philoscki vittata Say, Journ. acaii nat sci. Phil, 1818, vol. 1, 

 p. 429. "United States." Harger, Rept. U. S. commr. of 

 fish & fisheries, pt. 6, for 1878 (1880), p. 306, pi. 1, fig. 1. 



Under rubbish and stones. 



Mass. — Barnstable; Vineyard Sound; Woods Hole. 

 CoNX. — Stony Creek. 



138. PoRCELLio RATHKii Brandt. 



PorcelUo rathkii Brandt, Bull. soc. ini}). nat. Moscou, 1833, 

 vol. 0, p. 177. "Germania." 



PorcelUo trwlttatus Lereboullet, Mem. soc. mus. hist. nat. 



