Fusus. MOLLUSCA. MURICID.E. 349 



spiral striae unequal, slightly wrinkled longitudinally ; aperture oblong, out- 

 er lip thin, the canal bent to the left. — Specimens resembling this shell are 

 found in what is supposed to be the upper marine formation of the Suffolk 

 coast, and figured in the Mineral Conchology, t. xxxv. It is probable that 

 they belong to marine diluvium of the modern epoch. 



331. F. despectus. — Shell ventricose with two carinated spi- 

 ral ridges. 



Murex desp. Linn. Syst. i. 1222. — M. carinatus, Penn. Brit. Zool. iv. 

 123. t. lxxvii. f. 96. Don. Brit. Shells, t. cix — M. duplicatus, lb. 

 t. cxix. — M. cor. Turt. Conch. Diet. 88. t. xxvii. f. 95. — Scottish and 

 Irish coasts, rare. 

 Length about 3 inches ; white ; strong ; whorls eight, the body one occu. 

 pying half the shell, faintly striated spirally, with irregular longitudinal lines 

 of growth ; upper part of each whorl depressed ; ridges even or waved ; aper- 

 ture suborbicular This is probably nothing more than a variety of the F. 



antiquus. 



332. F. retroversus. — Whorls five, sinistral, rounded, smooth 

 and glossy. 



Flem. Wern. Mem. iv. 498. t. xv. f. 2 — In shell sand from Noss Island, 



Zetland, collected after a storm in the spring of 1809. 



Length about a line ; translucent ; whorls increase rapidly, giving the shell 



a bellied appearance ; aperture oblong, outer lip joining the body at an acute 



angle ; pillar straight, slightly scooped out at the apex for the canal, which 



is shallow, regular, and short ; lines of growth scarcely perceptible. 



** Whorls with longitudinal ribs. 



l/'— 333. F. turricola. — Whorls seven, compressed, flattened on 

 the top, the ribs bending inwards to the separating line. 



Murex turricola, Mont. Test. Brit. 262. t. ix. f. 1 — M. angulatus, Don. 



Brit. Shells, t. 156.— In deep water, not uncommon. 



Length |ths, breadth \t\\ of an inch; white, or slightly rufous; turrited; 



whorls with about twelve longitudinal ribs, crossed by spiral striae ; aperture 



narrow, ending in a wide canal, outer lip slightly thickened, inner lip smooth 



and broad. 



334. F. proximus. — Whorls six, slightly flattened at the top ; 

 the outer lip remarkably broad and reflected. 



Murex prox. Mont. Test. Brit. Sup. 118. t. xxx. f. 8,— Dunbar, Mr 



Laskey. 

 Length nearly half an inch ; strong ; white ; whorls slightly compressed ; 

 deeply divided at the separating line ; destitute of spiral striae ; aperture 

 ovate, oblong; the canal short, and rather spreading at the end. 



335. F. costatus. — Whorls six, with nine longitudinal, ob- 

 lique, raised, and slightly waved ribs, destitute of spiral strias. 



Murex costatus, Penn. Brit. Zool. iv. 125. Don. Brit. Shells, t. cxi. 



Mont. Test. Brit. 265 In sandy bays, not common. 



Length about T 3 5 ths of an inch, glossy brown or yellowish white, with fine 

 spiral brown streaks that look like strias ; whorls rather flat ; aperture nar- 

 row, terminating in a canal very little more contracted than the rest of the 

 mouth, outer lip thick. 



