BY THE REV. J. E. TENISON-WOODS. 11 



Pleurotoma clar^:. PI. 3, fig. 11. 



Testa elongato-fwiftirpii, torn/', opaca; anfr. GA, convexis, declivilus, 



iindique tenue, spiraliter liratis, spira nodoso-costatis, penult, anfr. 



aholetis, ult. evanidzs, apertura late ovata, lahro tenui, sinu lato, 



postico, profundo ; ultimo anfr. ad per ipheriam obtuse angulato. Alt. 



11, lat. 4. 



This fossil must be mainly distinguished by the absence of 

 any ornament. The upper part of the spire is ribbed and in the 

 lower whorls, these ribs become obsolete. The periphery of the 

 last whorl is obtusely angular and the whole shell is covered 

 spirally with close fine thread-like lirce. The aperture is broad 

 and the sinus wide, deep, and conspicuous. A peculiarity in 

 this shell is that the lines of growth scarcely show at all. 



Fig. 12 on the same plate appears to be a variety of the same 

 shell in which the ribs are closer and more crescentic on the spire 

 and the lines of growth are more distinct. 



DRILLIA INTEGRA. PL 3, fig. 4. 



Testa elongato-fusi for mi , spira quam apertura longiori, tenui, polita; 

 anfr. 6^- parum convexis, conspicue eostatis, sup erne late sulcatis ; 

 regulariter, spiraliter, concinne, liratis ; costis latis, rotundatis, 

 obliquiis ; striis incrementi conspicuis, apertura rhomboidea, quasi 

 Integra; labro incrassato, sinu postico lato, profundo, cum sulco 

 anfractuum concurrente ; labio crasso, reflexo, postice elevato, canali 

 brevi; nucleo (2% anf.J Icevi; sutura marginal a. Alt. 9^, lat. 4, long 

 spiree 6. 



Shell elongately fusiform, spire longer than the aperture, thin, 

 polished; whorls 6^- slightly convex, conspicuously ribbed, broadly 

 sulcate above, regularly, spirally, neatly, lirate ; ribs wide, 

 rounded, oblique, lines of growth conspicuous. Aperture 

 rhomboid, almost entire. Labrum thickened, sinus deep, broad, 

 corresponding with the groove in the whorls ; lip thick, reflexed 

 raised posteriorly ; canal short, nucleus of 2£ whorls, smooth, 

 suture marginate. . 



