532 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.xxhi. 



Family X. LIMNORIID^E. 



35. LIMNORIA Leach. 

 86. LIMNORIA LIGNORUM (Rathke). 



Cijmothoa Ugnorum Rathke, Skrivt. of Naturh. Selsk., Y, 1799, p. 101, pi. iii, fig. 

 14 (White). 



Limnoria tenebrans Leach, Ed. Encycl., VII, 1813, p. 433 (Am. ed., p. 273); 

 Trans. Linn. Soc, XI, 1815, p. 37; Diet. Sci. Nat., XII, 1818, p. 353.— Des- 

 MAREST, Consid. Crust., 1825, p. 312. — Latreille, Regne Anim., IV, 1829, p. 

 135. — Edwards, Annot. de Lamarck,- V, 1838, p. 276; Hist. Nat. des. Crust., 

 Ill, 1840, p. 145; Regne Anim., Crust., 1849, p. 197, pi. lxvii, fig. 5.— Gould, 

 Invert. Mass., 1840, pp. 338, 354. — Verrill, Proc. Am. Assoc, 1873 (1874), 

 p. 367. 



Limnoria Ugnorum White, Pop. Hist. Brit. Crust., 1857, p. 227, pi. xii, fig. 5. — 

 Bate, Rep. Brit. Assoc, 1860 (1861), p. 225. — Bate and Westwood, Brit. 

 Sess. Crust., II, 1868, p. 351.— Norman, Rep. Brit. Assoc, 1868 (1869) p. 

 288.— Verrill, Am. Joum. Sci., VII, 1874, pp. 133, 135; Proc. Am. Assoc, 

 1873 (1874), p. 371; Report U. S. Com. of Fish and Fisheries, 1874, Pt. 1, p. 

 379 (85).— Harger, Report U. S. Fish Com. 1874, Pt. 1, p. 571 (277) pi. vi, 

 fig. 25; Proc U. S. Nat. Mus., II, 1879, p. 161. — Stebbixg, Trans. Devon. 

 Assoc, 1874, p. 8; Ann. Mag. Nat. Hist., 4th ser., XVII, 1876, p. 79.— 

 Smith, Proc. U. S. Nat. Mus., II, 1879 (1880), p. 232, fig. 2. 



Limnoria uncinata Heller, Verh. k. k. Zool. Bot. Ges. Wien, XVI, 1866, p. 734. 



Limnoria Ugnorum Harger, Report U. S. Fish Commissioner, 1880, Pt. 6, pp. 

 373, 376 (see Harger for synonymy). 



Limnoria caUfornica Hewston, Proc. Cal. Acad. Sci., V, 1874, p. 24 (nomen 

 nudum). 



Hahitat. — From Florida to Halifax, and Gulf of St. Lawrence; also 

 coast of Great Britain; North Sea; Adriatic Sea; Pacific Ocean; Cali- 

 fornia; coast of Norway. 



Family XL SPH.EROMID^E. 



analytical key to the genera of SPH.EROMID.E. 



a. Outer branch of the uropoda small, almost rudhnentary 36. Cassidina. 



a'. Outer branch of the uropoda not rudimentary. 



b. Both external and internal branches of the uropoda projecting and exposed; 

 outer branch capable of folding under inner. 



c. Terminal segment of the ab<lomen entire 37. Sphseroma. 



c'. Terminal segment excavated at its extremity 38. Di/namenc. 



I/. Only external branch of the uropoda projecting and exposed; outer branch 

 incapable of folding under inner. 

 c. All the thoracic segments of equal length. Penultimate abdominal segment 

 in male generally produced in spine. Terminal segment excavate with or 



without median lobe 39. CiUcsea. 



</. Sixth segment of the thorax much enlarged, and produced at the center far 

 backward, covering the shorter seventh segment for the m^ost part. Ter- 

 minal segment excavate 40. Nsesa. 



