CRUSTACEA. 39 



ARTHROSTRACA. ISOPODA. 



CYMOTHOIDAE. 



Livoneca ovalis Harger, Kept. U. S, commr. of fish & fish- 

 eries, pt. 1, for 1871-1872 (1873), p. 572 [278]; o;9. cit, pt. 6, 

 for 1878 (1880), p. 395, pi. 11, fig. 67. 



From scup and bluefish. 



Mass. — Vineyard Sound. 



Conn. — Thimble Islands; New Haven. 



LIMNORIIDAE. 



117. LiMNORiA LiGNORUM (Ratlike). 



Grribble. 



Cymothoa lignorum Rathke, Skrivt. natiirh. selsk., 1799, vol. 

 5, pt. 1, p. 101, pi. 3, fig. 14. [Western coast of Norway 

 FROM Bergen to Nordland.] 



Limnoria lignorum Harger, Rept. U. S. coramr. of fish & 

 fisheries, pt. 1, for 1871-1872 (1873), p. 571 [277], pi. 6, fig. 25. 



Burrows in Avood. 



From Bay of Fimdy to western end of Long Island Sound ; 

 to a depth of 10 fathoms. 



SPHAEROMIDAE. 



118. Sphaeroma quadridentatum Say. 



Sphaeroma quadridentata Say, Journ. acad. nat. sci. Phil., 

 1818, vol. 1, p. 400. "coast of Georgia and of East 

 Florida." Harger, Rept. F. S. commr. of fish tfe fisheries, pt. 1, 

 for 1871-1872 (1873), p. 569 [275], pi. 5, fig. 21. 



Under stones and rocks and on seaweeds. 



Mass. — Provincetown. 



Common on southern shore of New E^ngland. 



