Fusus. 871 



probably prove to belong to the genus Pallia of Gray. Mr. Say's 

 specific name is preoccupied by another species of Bucciimm. 



Family MURICID.E, Flem. 



Shell with a canal, more or less extended, in front of the aper- 

 ture, the outer lip of which docs not alter its form by age. 



Oesiiis rUSUS, Lamarck. 1799. 



Shell elongated, tapering to both ends, without varices ; aper- 

 ture oval, terminating in a straight or slightly curved canal ; opercu- 

 lum horny, pear-shaped, with the nucleus at the small end. 



Fusus Islandicus. 



Shell elongated, bluish-wliite, covered with a horn colored epidermis ; whorb 

 eight, marked with equidistant, revolving lines ; aperture as long as the spire. 



Murex corneus, Pennant, Brit. Zool. iv. 124, t. 76, fig. 99. — Montagu, Test. Brit. 2.58. 

 — Donovan, Brit. Shells, ii. pi. 38. — Tukton, Conch. Diet. 89. — Dillwyn, 

 Catal. ii. 733. — Wood, Index, pi. 27, fig. 107. 



Murex Islandicus, Gmelin, Syst. 3.5.5.i. 



Fusus Idaudicus, Maiitini, Conch, iv. 1.59, t. 141, figs. 1312, 1313. — Lam. An. sans 

 Vert. 1st ed. vii. 12G ; 2d ed. ix. 4.50. — Brug. Encyc Me'th. Vers. iii. 101, pi. 429, 

 fig. 2. — KiKNER, Species {Fusus), pi. 7, fig. 2. — Gould, Inv. 1st ed. 284 — De 

 Kay, N. Y. Moll. 144, pi. 8, fig. 185. — Stimpson, Check Lists, 6. 



Fusus corneus. Say, Amer. Couch, pi. 29. — Fleming, Brit. Anira. 348. — Brown, 

 Conch of Great Brit. &c. pi. 47, figs. 7, 9 ; Encyc. Brit. vi. 448. 



Buccinum rjracile, Da Costa, Brit. Conch. 124, t. 6, fig. 5. 



Buccinum angustius, Lister, Conch, t. 913, fig. 5. 



Shell ovate, elongated, bluish-white, ponderous, semi-transpar- 

 ent, covered with a horn colored, somewhat velvety epidermis ; 

 whorls eight or nine, moderately convex, somewhat compressed 

 before the suture, the anterior whorl equalling two thirds the length 

 of the shell ; the whorls covered with equidistant, sub-equal raised 

 revolving lines, quite apparent through the epidermis ; lines of 

 growth faint ; suture distinct, somewhat channelled. Aperture ob- 

 long oval, half as long as the shell, polished, porcelain-white within ; 

 outer lip sharp, and minutely crenulated by the revolving lines ; pil- 

 lar smooth, and overspread with enamel ; canal moderately pro- 

 duced, and gently curved backwards. Length, two and three fourths 

 inches ; breadth, one and one tenth inches ; divergence, forty-five 

 degrees. 



