•210 



Pyrula — continued. 



hidbiformis* . . ovate, ventricose, rather smootli ; spire hooked ; 



tail rather bowed ; the left side thickened as by a callus 



on the columella — 2| inches. 

 terehralis. . girt with transverse and granulated striee ; whirls 



dentatedly carinated, spire like a screw — small. 

 cifharellus. . tnrreted, with smooth narrow ribs ; base short — 



small. 

 Icevigatus. . fusiform and turreted ; spire smooth and conical, 



with a mammillary termination. 

 striatulus. . fusiform and turreted ; the turns flat on their tops 



and sides, with very fine equal striae — very small. 

 bijjUcatus. . ovate, transversely striated ; longitudinal ribs ; 



columella with two folds — very small. 

 variabilis. . many ribbed, turns subangular — small. 

 truncatulatus. . ovate and turreted, the margins of the spiral 



turns truncated, the spire plicated — small. 



Pleurotoma. 



jilosa. . ovato-ftisiform, lip aleeform — 1| inch. 

 lineolafa. . ovate-fusiform — var. ? 

 clavicularis. . fusiform, turreted, whirls bordered with striae on 



the upper part, lip alated — 2 inches. 

 glahrata. . fusiform, base transversely grooved — 1 j inch. 

 marginata. . turns bordered upwards by a cord-like margin, and 



separated by two or three grooves with sunk points. 

 transvprsaria. . fusiform, deeply grooved transversely, whirls 



carinated — 2| inches. 

 catenata. . fusiform, decussated; the transverse striae strongest, 



like a chain of tubercles on every turn — 2 inches. 

 dentata. . fusiform ; a dentated keel on each turn — 1^ inch. 

 undata. . fusiform, turreted ; whirls crenulated, with undulated 



ribs on their upper part, the tail short — 1 inch. 

 midtinoda. . fusiform, turreted ; whirls submarginated, nodulous 



in the middle — | inch. 

 crenulata. . fusiform, turreted ; straight ribs, like cogs of a 



wheel on each whirl — | inch. 

 bicafenafa. . fusiform, turreted ; with two rows of nodes on the 



upper part of the whirls — f inch. 

 costellata.. . oval, fusiform; whirls with longitudinal ribs — | inch. 

 2>licata. . fusiform, turreted ; whirls with rather curved plaits. . 



small . 

 sulcata. . fusiform, turreted ; decussated in the lower part ; 



whirls with longitudinal ribs. . small. 

 curvicosta. . ovato-fusiform ; bent ribs, as if split or bifid at their 



tops. . ^ inch. 

 fur cat a. . whirls, with ribs contracted above their middle, and 



forked underneath. 



Murex bulbus — Brand, Foss. fig. 54. 



