8 BULLETIN 54, UNITED STATES NATIONAL MUSEUM. 



Periopoda having the lirst three joints short and broad, being affixed 

 to the side of the pereion like plates of mail (hence the specific name); 

 they terminate in short, pointed dactjli, and have the propodi armed 

 with two lateral rows of strong, black, pointed teeth. 



"This species was taken from the hollow of a sponge dredged in 

 Esquimault Harbor, at the depth of about ten fathoms."" — Spence 

 Bate." 



TANAIS CAVOLINII '' Milne Edwards. 



Tanais cavolinii Milne Edwards, in Audouin and ]Milne Edwards Precis d'Ento- 

 mologie, I, 1829, pi. xxix, tig. 1; Hist. Nat. des Crust., Ill, 1840, p. 141, pi. 

 XXXI, fig. 6. 



Tanais tomentosus Kr0ver, Nat. Tidsskrift, IV, 1842, p. 183. 



Crossv^rus vittatus Rathke, Nova Acta Academise Caesarese Leopoldino-Carolinae 

 Naturae Curiosorum, XX, 1843, p. 39, pi. i, figs. 1-7. 



Tanais tomentosus Kr0yer, Nat. Tidsskrift (2), II, 1847, p. 412; Voy. en Scand., 

 Crust., 1849, pi. xxvii, figs. 2 a-q. — Lilljeborg, Ofvers. Vet. Akad. Forh., 

 Arg., VIII, 1851, p. 23. 



Tanais hirticavdatus Bate, Rep. Brit. Assoc, 1860, p. 224, 1861. 



Tanais vittatus Lilljeborg, Upsala Univ. Arsskr., Math, og Naturv., I, 1865, pp. 

 29-30. — Bate and Westwood, Brit. Sess. Crust., II, 1866, p. 125. — Stebbing, 

 Trans. Devon. Assoc, 1874, p. 7. — McDonald, Trans. Linn. Soc (2), I 

 (Zoology), p. 67, pi. XV.— Stebbing, Ann. Mag. Nat. Hist. (4), XVII, 1876, 

 p. 78; Trans. Devon. Assoc, 1879, p. 6. — Harger, Proc U. S. Nat. Mus., 

 II, 1879, p. 162; Report U. S. Fish Comm., 1880, Pt. 6, pp. 418-419, pi. 

 XIII, figs. 81-82. 



Tanais tomentosus Sars, Archiv. for Math, og Naturvid., 1882, pp. 22-23. — Scott, 

 Ann. Scottish Nat. Hist., 1898, pp. 218-219.— G. O. Sars, Crust. Norway, 

 II, 1899, p. 12, pi. V. 



Tanais cavolinii Dollfus, Bull. Soc Zool. France, XXII, 1897, p. 207; Mem. 

 Soc. Zool. France, XI, 1898, p. 35.— Norman, Ann. Mag. Nat. Hist. (7), 

 in, 1899, pp. 332-333. (See Norman for synonymy. ) — Rich.\rdson, Proc. 

 U. S. Nat. Mus., XXIII, 1901, p. 501; Trans. Conn. Acad. Sciences, XI, 

 1902, p. 278. 



localities. — Noank, Connecticut; Long Island Sound; Greenland; 

 Castle Harbor, Bermudas, in dead coral; also west coast of Norway; 

 British Isles; Bay of Fayal; West France; Azores; in the Atlantic at 

 lie Dumet, near Croisac; Guetharr}-; St. Jean de Luz; Hendaye; in 

 the Mediterranean at Banyuls; Cette; Bandol; Cannes; He Rousse; 

 Porto Vecchio; St. Eugene; Lake of Bizerte; Sousse. 



Deptli. — Occurs on piles and among algfe and eel-grass (Harger.) 

 1-6 ft. (Verrill). 



Found in sponges, algte; on Pinna; on Balanns; on Zaminaria; 

 on oysters. 



Body elongate, four times longer than wide, 1 mm. : 4 mm. Head 

 about as wide at the base as it is long, 1 mm. : 1 mm., becoming grad- 

 ually narrower from the base to the anterior end, where it is about 



« Lord's Naturalist in British Columbia, II, 1866, p. 282. 

 ^See Harger for more complete description of this form. 



