CRUSTACEA. 45 



ARTHROSTRACA. ISOPODA. 



MUNNOPSIDAE. 



135. Ilyarachna, species, Harger. 



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

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



MUD, 21 MILES EAST OP CAPE COD LIGHT." 



Perhaps I. hirticeps G. 0. Sars. 



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



ONISCIDAE. 

 Sow-bugs; Pill-bugs; Wood-lice. 



136. Oniscus asellus Linne. 



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

 637. "Habitat iisr Domibus, Mueis, Hybernaculis, ligxis 



PUTRIDIS." 



Oniscus tniirarius Cuvier, Journ. hist, nat., Paris, 1792, vol. 2 

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



Me. — Freeport. 

 Mass. — Woods Hole. 

 R. I. — Providence. 



137. Philoscia viTTATA Say. 



Philoscia vittata Say, Journ. acad. 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. 

 Conn. — Stony Creek. 



138. PoRCELLio rathkii Brandt. 



Porcellio rathkii Brandt, Bull. soc. imp. nat. Moscou, 1833, 

 vol. 6, J). 177. "Germania." 



Porcellio trivittatus Lerebovillet, Mem. soc. nius. hist. nat. 



