MARINE ISOPODA OF NEW ENGLAND, ETC. 315 



is represented in our limits by a single species, I have not been able to 

 separate the generic from the specific characters with confidence, and 

 have therefore described the species without attempting it. 



Jeera albifrons Leach. 



" Oniscus albifrons Montague MSS." (Leach). 



Jcera albifrons Leach, Ed. Encyc., vol. vii, p. " 434 " ( Am. ed. , p. 273), "1813-14"; 



Trans. Linn. Soc., vol. xi, p. 373, 1815. 

 Samouelle, Ent. Comp., p. 110, 1819. 

 Desmarest, Diet. Sci. nat., tome xxviii, p. 381, 1823; Consid. Crnst., p. 316, 



1825. 



Latreille, Regne Anim., tome iv, p. 141, 1829. 

 Edwards, Annot. de Lamarck, tome v, p. 267, 1838; Hist. nat. des Crust , 



tome iii, p. 150, 1840; Regne Anim., Crust., p. 204, 1849. 

 Moore, Charlesworth's Mag. Nat. Hist., n. s., vol. iii, p. 294, 1839. 

 Thompson, Ann. Mag. Nat. Hist., vol. xx, p. 245, 1847. 

 White, List Crust. Brit. Mus., p. 97, 1847; Brit. Crust. Brit. Mus., p. 69, 



1850; Pop. Hist. Brit. Crust., p. 231, 1857. 



. . o p 



Lilljeborg, Ofvers. Vet-Akad. Fork., Arg. viii, p. 23; 1851; ibid., Arg. ix. 



p. 11, 1852. 



Gosse, Man. Mar. Zool., vol. i, p. 136, fig. 243, 1855. 

 M. Sars, Christ. Vid. Selsk. Forh., 1858, p. 153, 1859. 

 Bate, Rep. Brit. Assoc., 1860, p. 225, 1861. 

 G. O. Sars, Reise ved Kyst. af Christ., p. (29), 1866 ; Christ. Vid. Selsk. 



Forh., 1871, p. 272, 1872. 



Norman, Rep. Brit. Assoc., 1866, p. 197, 1867; ibid, 1868, p. 288, 1869. 

 Bate and Westwood, Brit. Sess. Crust., vol. ii, p. 317, figure, 1868. 

 Metzger, J. B. Naturhist. Ges. Hannover, xx, p. 32, 1871 ; Nordseefahrt 



der Pomm., 1872-'3, p. 285, 1875. 

 Parfitt, Trans. Devon. Assoc., 1873, p. (18), "1873." 



Stebbing, Jour. Linn. Soc., Zool., vol. xii, p. 149, 1874 ; Ann. Mag. Nat. Hist., 

 IV, vol. xvii, p. 79, pi. v, figs. 5-6, 1876; Trans. Devon. Assoc., 1879 p. 

 (7), 1879. 



Meinert, Crust. Isop. Aniph. Dec. Dan., p. 80, " 1877." (laira.) 

 Harger, Proc. U. S. Nat. Mus., 1879, vol. ii, p. 158, 1879. 



Jcera Kroyeri Zaddach, Syn. Crust. Pruss. Prod., p. 11, "1844" (J, Kroyeri Ed- 

 wards ?). 



Jcsra baltica Fried. Miiller, Arch. Naturg., Jahrg. xiv, p. 63, pi. iv, fig. 29, 1848. 

 Jcera copiosa Stimpson, Mar. Inv. G. Manan, p. 40, pi. iii, fig. 29, 1853. 

 Packard, Canad. Nat. and Geol., vol. viii, p. 419, 1863. 

 Verrill, Am. Jour. Sci., Ill, vol. vii, p. 131, 1874; Proc. Amer. Assoc., 



1873, p. 369, 1874 ; This Report, part i, p. 315 (21), 1874. 

 Harger, This Report, part i, p. 571 (277), 1874. 

 Jcera nivalis Packard, Mem. Bost. Soc. Nat. Hist., vol. i, p. 296, 1867 (J. nivalis 



Kroyer ?.) 



Asellus Gronlandicus Packard, loc. cit. (no* of Kroyer). 

 Jcera marina Mb'bius, Wirbellos. Thiere der Ostsee, p. 122, 1873 ; Ann. Mag. 



Nat. Hist., IV, vol. xii, p. 85, 1873. (J. marina Fabricius ?.) 

 Jcera maculata Parfitt, Trans. Devon. Assoc., 1873, p. "253" (18), "1873." 

 Stebbing, Trans. Devon. Assoc., 1879, p. (7) 1879, (albifrons). 



PLATE I, FIGS. 4-8. 



This species is at once distinguished from the other marine Isopoda 

 of our coast by the short uropods, arising from a notch in the end of the 



