MARINE ISOPODA OF NEW ENGLAND, ETC. 373 



The relations of the present family with the S])hceromidce appear to 

 be more close, but the structure of the mandibles and perhaps also that 

 of the maxillipeds, the fully segmented pleon and the biramous uropods 

 seem to be characters of family value, which, however, a fidler investi- 

 gation of the boring Siihmromidm might go far to break down. 



Linuioria Leach. 

 Limnoria Leach, Ediuburgh Eucyc, vol. vii, p. "433" (Am. ed., p. 273), "1813-14." 



Mandibles with a nearly even chisel-like cutting-edge at the tip and 

 no molar process j maxillipeds elongate, with a well-developed external 

 lamella and a five-jointed palpus; first thoracic segment large; uropods 

 with the outer ramus very short and almost obsolete. 



The abov^-characters differ from those by which Leach separated this 

 genus from Cymothoa and the Sphc6ro7nidce, with which he associated it. 



Limuoria lignorum White (Rathke). 



"Cymothoa lignorum Rathke, Skrivt. af Naturh. Selsk., v. 101, t. 3, f. 14, 1799" 



(White). 

 Limnoria terebrans Leach, Ed. Encyc, vol. vii, p. '433' (Am. ed., p. 273), 



"1813-14"; Traus. Liun. Soc., vol. xi, p. 371, 181.5; Diet. Sci. nat., tome 



sii, p. 3.53, 1818. 

 Samouelle, Eut.. Conip., p. 109, 1819, 

 Desmarest, Cousid. Crust., p. 312, 182.5. 

 Latreille, Regne Anim., tome iv, p. 135, 1829. 



Coldstream, Edinb. New Phil. Jour., vol. xvi, pp. 316-334, pi. vi, 1834. 

 "Hope, Trans. Ent. Soc. Lend., vol. i, p. 119" (B. & W.). 

 Thompson, Edinb. New Phil. Jour., vol. sviii, -p. 127, 1835; Ann. Mag. 



Nat. Hist., vol. xx, p. 157, 1847. 

 Terapleton, Loud. Mag. Nat. Hist., vol. ix, p. 12, 18.36. 

 Moore, Charlesworth's Mag. Nat. Hist., u. s., vol. ii, p. 206, 1338; ibid., 



vol. iii, pp. 196, 293, 1839. 

 Edwards, Annot de Lamarck, torn, v, p. 276, 1838; Hist. nat. des Crust., 



tom. iii, p. 145, 1840; Rfegne Anim. Crust., p. 197, pi. 67, f. 5, 1849. 

 Gould, Invert. Mass., pp. 338, 354, figure, 1840. 

 Fleming, Encyc. Brit., 7 ed., vol. vii, p. 502, 1842. 

 Dekay, Zool. New York, Crust., p. 48, pi. ix, fig. 33, 1844. 

 ^'Kirby and Spence, lut. Eutom., 5th ed., p. 238; 6th ed., p. 203" (White.) 

 White, List Crust. Brit. Mus., p. 96, 1847; Brit. Crust. B. Mus., p. 68, 1850, 

 Dalyell, Powers of the Creator, vol. i, p. 241, pi. Ixv, figa. 7-15, 1851. 

 Leidy, Jour. Acad. Nat. Sci. Phil., II, vol. iii, p. 1.50, 1855. 

 Gosse, Man. Mar. Zool., vol. i, p. 136, fig. 242, 1855. 

 Steenstrup and Liitkeu, Vidensk. Meddel., II, vol. ii, p. 275, 1861. 

 Hesse, Ann. Sci. nat., Zool., V, tome x, p. 113, 1868. 

 Jones, Trans. Nova Scotian lust. Nat. Sci., vol. ii, pt. iv, p. 99, 1870. 

 Verrill, Proc. Am. Assoc., 1873, p. 367, 1874. 

 Macdonald, Tiaus. Linn. Soc, II, Zool., vol. i, p. 67, 1375. 

 Andrews, Q. Jour. Mic. Sci., II, vol. xv, p. 332, 1875. 

 Limnoria lignorum White, Pop. Hist. Brit. Crust., p. 227, pi. 12, fig. 5, 1857. 

 Bate, Rep. Brit. Assoc, 1860, p. 22.5, 1861. 

 Bate and Westwood, Brit. Sess. Crust., vol. ii, p. 351, figure, 1868. 



