119 

 PLEUROTOMA priscus. 



TAB. CCCLXXXVl. 



Spec. Char. Fusiform, tiirreted, smooth ; base 



transversely sulcated ; margins of the whorls 



striated ; lip wing-shaped. 

 Syn. Murex priscus, Brander, 25 et 44. Pleu- 



rotoma clavicularis, JLam. env. de Paris, 69 ; 



Hist. Nat. des Ann. sans vert. 7, 98. 



J. HE whorls are slightly convex and smooth, excepting 

 two or three hollow lines, which are niost conspicuous 

 in young shells near their upper edges ; the base is 

 drawn out almost into a beak ; it is blunt and strongly 

 striated, the lip below the sinus is nearly semicircular. 



Brander's figure of this shell is far from good, and that 

 in the Encyclop6die M^thodique is worse. The former 

 appears to have been overlooked by Lamarck, or he would 

 not perhaps have changed the name. 



Common atHordwell, and near Paris. 



PLEUROTOMA fusiformis. 



TAB. CCCYXXXNIL—Fig. 1. 



Spec. Char. Fusiform elongated, rough, with 

 deep transverse striae, and obscure longi- 

 tudinal costal ; whorls subcarinated, with a 

 striated band upon their upper parts ; aper- 

 ture lanceolate. 



J. HE deep striae leave between them ridges that are 

 roughened, but not regularly crenulated by the lines of 

 growth ; the band near the top of each whorl is nearly 

 smooth, but it has arched striaj upon it, following the 

 sinus in the upper part of the lip. 



Found at Highgate, but rarely ; I have never seen it 

 perfect. 



