MARINE ISOPODA OF NEW ENGLAND, ETC. 373 



The relations of the present family with the Sphceromidce appear to 

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

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

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

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



Limnoria Leach. 

 Limnoria Leach, Edinburgh Encyc.,-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; inaxillipeds elongate, with a well developed external 

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

 with the outer rarnus very short and almost obsolete. 



The above characters differ from those by which Leach separated this 

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



Linmoria lignorum White (Eathke). 



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



(White). 

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



"1813-14"; Trans. Linn. Soc., vol. xi, p. 371, 1815; Diet. Sci. nat., tome 



xii, p. 353, 1818. 



Samouelle, Ent.. Cornp., p. 109, 1819. 

 Desmarest, Cousid. Crust., p. 312, 1825. 

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



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

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

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



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



Templeton, Loud. Mag. Nat. Hist., vol. ix, p. 12, 1836. 

 Moore, Charlesworth's Mag. Nat. Hist., n. s., vol. ii, p. 206, 1838; ibid., 



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

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



torn, iii, p. 145, 1840; Regne Anim. Crust., p. 197, pi. 67, f. 5, 1849. 

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

 Flemiug, Eucyc. Brit., 7 ed., vol. vii, p. 502, 1842. 

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

 "Kirby and Spence, Int. Entom., 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, figs. 7-15, 1851. 

 Leidy, Jour. Acad. Nat. Sci. Phil., II, vol. iii, p. 150, 1855. 

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

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

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

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

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

 Macdonald, Trans. Linn. Soc., II, Zool., vol. i, p. 67, 1875. 

 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. 225, 1861. 

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



