292 INVERTEBRATA OF MASSACHUSETTS. 



moderately arched, twisting outwards at the commencement of the 

 beak. Length ~ inch, breadih i inch, divergence 48°. 



First found by Mr. Couthouy, in fish taken near Nahant, and 

 frequently obtained since from the same locality. 



It bears a close resemblance to Fitsus turricula ; and Mr. Sowerby 

 seems rather disposed to regard it as such. But the marks of distinc- 

 tion are constant. The flesh color is invariable ; the length of the 

 body whorl proportionally greater, and it is more convex, and less an- 

 gular ; the folds are more oblique, more rounded, and the beak is 

 shorter, but more curved. 



From F. rufus it is distinguished by a less dark color, less promi- 

 nent but closer ribs, more conspicuous shoulder, and by its less elon- 

 gated and slender form, and the absence of a notch at the posterior 

 junction of the outer lip. 



It has a general resemblance to pi. 48, f. 43, 44, of " Brown's 

 Conch, of Great Brit,," &c. which he calls Fusus casidneus. 



FUSUS TURRl'CULA. 



Shell white, thin, whorls very conspicuously angulated and tur- 

 reted, with twelve or fourteen 'prominent ribs, and numerous dis- 

 tinct, revolving lines. 



Figure 193. 



State Coll., No. 16. Soc. Cab., No. 2357. 



Murex turricula, Montagu; Test. Brit., 262, pi. 9, f. 1. Turton ; Conch. 



Did., 93. DiLLWYN ; Catal., 744. Maton and Rackett ; Li?i. Trans., viii. 



144. Dorset Catal, pi. 14, f. 15. Wood; /nrfez, pi. 27, f. 133. 

 Fusus turriculus, Brown ; Conch, of Great Brit., pi. 48, f. 51, 52. 

 Fusus turricula, Fleming ; Biit. Jlnim., 349. 

 Murex angulatus, Donovan ; Brit. Shells, v. 15G. 



Shell thin, pure white, sometimes yellowish or brownish- 

 white ; with seven or eight whorls, rising nearly perpendicularly 

 from each other to an acute apex, and having an abrupt, broad, 

 nearly flat slope at their summits ; surface with twelve or fourteen 

 somewhat oblique, rather compressed ribs, which vanish before 

 attaining the front, traversed by numerous distinct, elevated lines, 

 of which one at the angle of the whorls is most prominent, these 

 obsolete at the edge of the ribs ; beak short, open, and nearly 

 straight ; aperture oblong, broad, and angular behind ; outer lip 



