MAEINE ISOPODA OF NEW ENGLAND, ETC. 311 



II. BOPYRID.E. 



This family has not been studied, and only a list of the species, fur- 

 nished by Professor S. I. Smith, is included. They are parasitic on Crus- 

 tacea, and at maturity, the females especially, are generally much dis- 

 torted and degenerate, often losing a great proportion of their appendages. 

 The males are much smaller than the females, and of a more normal 

 form, and they and the young forms must therefore be relied upon to 

 indicate the affinities of this group to the rest of the order. According 

 to Dr. Fritz Miiller these forms indicate a relationship to the Oniscidce, 

 and especially to the genus Ligia, and in deference to his authority I 

 have inserted them at this place. 



Cepon distortus Leidy. 



Cepon distortus Leidy, Jour. Acad. Nat. Sci.,II, vol. iii, p. 150, pi. xi, figs. 26-32, 



1855.. 

 Harger, This Report, part i, p. 573 (279), 1874; Proc. U. S. Nat. Mus., 



1879, vol. ii, p. 157, 1879. 



Leidya distorta Cornalia and Panceri, Mem. E. Accad. Sci. Torino, II, torn, xix, 

 p. 114, 1861. 



"From the branchial cavity of Gelaswius pugilator, Atlantic City, 

 New Jersey." (Leidy.) 



Gyge Hippolytes Bate and Westwood (Kroyer). 



Bopyrus Hippolytes Kroyer, Gronlands Amfipoder, p. 306 (78), pi. iv, fig. 22, 1838; 

 Monog. Fremst. Slsegten Hippolyte's nordiske Arter, p. 262, 1842 ; Voy. 

 en Scand., Crust., pi. xxviii, fig. 2, 1849. 

 Edwards, Hist. nat. des Crust., iii, p. 283, 1840. 

 Stimpson, Proc. Acad. Nat. Sci. Philadelphia, 1863, p. 140. 

 Gyge Hippolytes Bate and Westwood, Brit. Sess. Crust., vol. ii, p. 230,1868. 

 Buchholz, Zweite deutsche Nordpolfahrt, p. 286, 1874. 

 Metzger, Nordseefahrt der Pomm., p. 286, 1875. 

 Miers, Ann. Mag. Nat. Hist., IV, vol. xx, p. 64, (14), 1877. 

 Smith in Harger, Proc. U. S. Nat. Mus., 1879, vol. ii, p. 157, 1879. 



Massachusetts Bay !, off Salem, on Hippotyte spinus, 30 fathoms, sand 

 and mud, August 4, 1877 ; on If. Fabricii, 22 fathoms, gravel, August 

 4, 1877 ; on H. seciirifrons^Q fathoms, soft mud, August 14, 1877. Casco 

 Bay !, on H. polaris and H. pmiola, 1873. Bay of Fundy !, on H. spinus 

 and H.pusiola, 1868, 1872. Off Halifax, Nova Scotia, 43 fathoms, Sep- 

 tember 27, 1877. Gulf of Maine !, 40 miles east of Cape Ann, Massa- 

 chusetts, on H. securifrons, 160 fathoms, soft mud, August 19, 1877; 

 also neitr Cashe's Ledge, on H. spina, 27 and 40 fathoms, rocks and 

 gravel. 



East side of Smith's Strait, north latitude 78 30' (Stimpson). "Dis- 

 covery Bay," north latitude 81 44', Greenland (Miers). British Islands 

 (Bate & Westwood). Scandinavian coasts (Kroyer et al.}. Spitzber- 

 gen (Kroyer). 



