British Species of Shells. 35 



rous slight longitudinal ribs, which are crossed by transverse depressed 

 lines, giving them a granulated surface : the front margin a little incurved ; 

 the hinge margin angular. 



This beautiful species, which has long been a desideratum 

 to the science, was taken in abundance, by Mr. Bean, on 

 some floating wood at Scarborough, who kindly sent us 

 some specimens. [See, in connection, the communication in 

 p. 353.] 



Pleuro'toma Trevellta^n zjiw [Turton]. 



Testa ovato-fusiforme J anfractibus 6 — 7, striis numerosissimis, apice 

 deplanatis. 



Shell oval-fusiform ; with 6 or 7 volutions, very closely striate, and 

 flattened at their tops. 



This new and very distinct species was found, by Mr. 

 Bean, abundantly at Scarborough. It is so extremely like 

 the Murex turricula of Montagu, as to be hardly distin- 

 guished, except by the following marks: — 1st, The outline 

 is of a more inflated cast ; 2dly, the striae are twice as nume- 

 rous ; 3dly, and the distinct notch at the upper angle of the 

 outer lip fixes its genus. 



In this genus we have also the ikfurex gracilis, M. sept- 

 angularis, and M. linearis of Montagu, and the M. Chord ula 

 of our Conchological Dictionary ; a pair of which, collected by 

 ourselves, are now in the cabinet of Mr. Clark. 



The M. purpureus of Montagu has sometimes this pleuro- 

 tomatic notch. 



. Fu^SUS FENESTRA^TUS [^TurtOfl], 

 Testa oblongo-fusiformi, alba, costis numerosis longitudinalibus striis 

 transversis reticulatis ; anfractibus octo, tumidis ; cauda producta, sinis- 

 trorsum curva; apice papillari; fauce albo lasvigato. 



Shell oblong-fusiform, white, with numerous longitudinal ribs, which are 

 reticulate by transverse striae ; volutions eight, swollen ; the tail produced, 

 a little turned to the left ; mouth white, smooth ; the tip papillary. 



Length, 1^ in. ; breadth, five eighths of an inch. In its outline it much 

 resembles the Fusus corneus j but the volutions are much more rounded 

 and deeply divided, and the tail is not so much elongated j the reticulations 

 are rather coarse, and slightly granular at the points of junction; the 

 colour is also of a much clearer ivory white. 



A pair of these were dredged up at Cork ; one of which 

 was sent to us by Mr. Humphries, and is now in the cabinet 

 of Mr. Clark. 



Fu^sus NoRWEGicus \_Turton'], iStrombus norwegicus Chamn, 

 Conch, X. t. 157. fig. 197, 198. 



Testa laevi, eburnea ; anfractibus planiusculis ; ultimo ventricoso ; labro 

 dilatato, intus laevigato. 



Shell quite smooth, ivory white ; volutions rather flat, the lower one 

 ventricose ; outer lip much dilated, and smooth on the inner margin. 



Length 3 in., and about 2 in. broad ; with six volutions, the last of which 

 is much enlarged ; of an ivory whiteness, with a slight ferruginous stain ; 

 aperture very large, twice as long as the rest of the shell, pure white 



