8 BULLETIN 54, UNITED STATES NATIONAL MUSEUM. 



Periopoda having the first 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 dactyli, 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 6 Milne Edwards. 



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

 inologie, I, 1829, pi. xxix, fig. 1; Hist. Nat. des Crust, III, 1840, p. 141, pi. 

 xxxi, fig. 6. 



Tanais tomentoms KR0YER, Nat. Tidsskrift, IV, 1842, p. 183. 



Crossurus vittatus RATHKE, Nova Acta Academise Csesarese Leopoldino-Carolinse 

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



Tanais tomentoms KR0YER, Nat. Tidsskrift (2), II, 1847, p. 412; Voy. en Scand., 

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

 irg., VIII, 1851, p. 23. 



Tanais hirticaudatus 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. 

 xin, 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; M6m. 

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



III, 1899, pp. 332-333. (See Norman for synonymy. ) RICHARDSON, Proc. 

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

 1902, p. 278. 



Localiti-es. 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 

 He Dumet, near Croisac; Gue"tharry; St. Jean de Luz; Hendaye; in 

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

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



Depth. Occurs on piles and among algae and eel-grass (Harger.) 

 1-6 ft. (Verrill). 



Found in sponges, algse; on Pinna; on Balanus; on Laminaria; 

 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 



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

 &See Harger for more complete description of this form. 



