ARCA. 243 



apart from these localities for this rare shell is Cape Clear, 

 the southern extremity of Ireland, off which it has been 

 dredged by Mr. M' Andrew in sixty fathoms. 



Abroad it occurs on the Norwegian coast from Bergen 

 to Denmark, and in the iEgean in as deep as two hundred 

 fathoms water. It is found as a fossil in the crag of 

 England and newer Pleiocene of Sicilv. 



A. barbata, Linnaeus. 



Elongated oblong, brown ; ligamental area long and narrow. 



Area barbata, Linn. Syst. Nat. (not Fauna Suec.) ed. 12, p. 1140. — Brown, 

 Mem. Werner. Soc. vol. ii. pt. 2, p. 512. — Fleming, Brit. 

 Anim. p. 398. — Brit. Marine Conch, p. 102. — Brown, 111. 

 Conch. G. B. p. 86, pi. 33, f. 7. — Born, Mus. Cses. Vind. p. 

 88. — Chemn. Conch. Cab. vol. vii. p. 187, pi. 54, f. 535. — 

 Poli, Test. Sicilian, vol. ii. p. 135, pi. 25, f. 6, 7. — Uillw. 

 Recent Shells, vol. i. p. 229. — Lam. Anim. s. Vert. (ed. Desh.) 

 vol. vi. p. 465. — Blainville, Manuel Malacol. pi. 65, f. 1. — 

 Philippi, Moll. Sicil. vol. i. p, 57, and vol. ii. p. 42. — Hanl. 

 Recent Shells, vol. i. p. 1 93, pi. 9, Area, f. 3. — Reeve, Conch. 

 Icon. Area, pi. 13, f. 83. — Deshayes, Exp. Scient. d'Algerie, 

 Moll. pi. 119 (anatomy). 

 „ reticulata, Turton, Conch. Diction, p. 7; Dithyra Brit. p. 168, 259. 



Elongated oblong, compressed cylindraceous, moderately 

 solid, opaque, equivalve, very inequilateral, surface not 

 shining, superficially brownish red, beneath which the tex- 

 ture is white, reticulately scabrous (like a file), owing to 

 the intersection of most closely disposed nearly equidistant 

 depressed radiating costellre, and crowded but rather ob- 

 scure concentric sulci. Coarse and somewhat flattened 

 bristles of a dark umber-brown more or less profusely clothe 

 the two extremities, and are arranged (the larger or prin- 

 cipal ones) upon the middle portion of the shell in rather 

 distant radiating series. Ventral margin straightish, or 



