86 LEPAS PECTINATA. 



Lepas anseeifeba. Poli. Test. Utriusque Scicil., vol. i, PI. vi, 

 figs. 25-27. 

 — sulcata. Montagu. Test. Brit., PL i, fig. 6, 1803. 

 Pentalasmis sulcata. Leach. Encyclop. Brit. Suppl., torn, iii, 

 Pl.lvii, 1824. 



— sprauLiE (!) (var.) Leach. Tuckey's Congo Expedit. 



Appendix, 1818. 



— eadula (var.) et sulcatus. Brown. Illust. of 



Conchology, PI. li, figs. 3—6, 1844. 



— inversus. Chenu. Illust. Conchy., PI. i, fig. 14. 

 Anatifa sulcata. Quoy et Gaimard. Voyage de 1' Astrolabe, 



PI. xciii, figs. 18, 20 * 



L. valvis tenuibus, crasse sulcatis, scepe pectinatis ; scu- 

 torum crista prominente ab umbone ad apicem juxta mar- 

 ginem occludentem pertinente : furcce carinalis cruribus 

 inter angulos 135° et 180° diver gentibus. 



Valves thin, coarsely furrowed, often pectinated. Scuta 

 with a prominent ridge extending, from the umbo to the 

 apex, close to the occludent margin ; fork of the carina 

 with the prongs diverging at an angle of from 135° to 

 180°. 



Filaments absent, or only one on each side. 



Var. (PL I, fig. 3 a), upper part of the terga (bounded 

 by the two occludent margins) produced and sharp ; 

 surface of all the valves often coarsely pectinated, and 

 with the carina barbed. 



Atlantic Ocean, from the North of Ireland to off Cape Horn ; common, 

 under the tropics ; Mediterranean : attached to wood, cork, charcoal, sea- 

 weed, a reed-like leaf, spirulae, cuttle-fish bones, to a bottle together with L. 

 anatifera ; to a ship's bottom, Belfast, ( W. Thompson.) Often associated 

 with L. fascicular is. Montagu states ('Test. Brit.,' p. 18) that this species 

 is sometimes attached to the fixed Gorgonia flabellum. 



General Appearance. — The capitulum varies consider- 

 ably in length compared to its breadth, caused chiefly by 

 the greater or less production of the occludent portion of 

 the terga ; valves thin, brittle ; the furrowed surface varies 



* I may add, that I have received many specimens incorrectly labelled 

 A. striata, which is properly a synonym of L. anserifera. 



