MARINE ISOPODA OF NEW ENGLAND, ETC. 315 



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

 separate tlie generic from the specific characters with confidence, and 

 have therefore described the species without attempting it. 



Jaera albiirous Leach. 



" Onisciis albtfrons Montague MSS." (Leach). 



J(wa ai6(/VoH8 Leach, Ed, Eucyc, vol. vii, p. " 434 "(Am. ed., p. 273), "1813-14"j 

 Traus. Liun. Soc, vol. xi, p. 373, 1815. 

 Samouelle, Eut. Comp., p. 110, 1819. 

 Desmarest, Diet. Sci. nat., tome xxviii, p. 381, 1823; Cpnsid. CroBt., p. 316, 



1825. 

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

 Edwards, Auuot. do Lamarck, tome v, p. 267, 1838; Hist. nat. des Crusti., 



tome iii, p. 150, 1840; E6gne Anim., Crust., i>. 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. Mns., p. 97, 1847; Brit. Crust. Brit. Mus., p. 69, 



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

 Lilljeborg, Ofvers. Vet-Akad. Forh., 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, Eep. Brit, Assoc, 1860, p. 225, 1861, 

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



Forh., 1871, p. 272, 1872. 

 Norman, Eep. 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, Jonr. 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, Cmst. Isop. Amph. Dec. Dan. , p. 80, " 1877." {laira.) 

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

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



wards ?). 

 Jcera 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 Eeport, part i, p. 315 (21), 1874. 

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

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



Kroyer ?.) 

 Asellus GroH Za«fZtcM8 Packard, loc. cit. (not of Kroyer). 

 Jcera viarina Mobius, Wirbellos. Thiere der Ostsee, p. 122, 1873 ; Ann. Mag. 



Nat. Hist., IV, vol. xii, \y. 85, 1873. (J. viarina Fabricius ?.) 

 Jan-a maculata Parfitt, Trans. Devon. Assoc, 1873, p. "2.53" (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 



