60 Sowerby on several new Sliells. 



Shell turrited, ■with fine close-set, longitudinal oblique striae ; 

 volutions six, the three upper ones small, rounded, smooth ; the 

 lower volutions rather ventricose ; sutures distinct ; aperture si- 

 nuous, obtusely angulated above and below, peristome reflected, 

 continuous, entire, no part of it adhering to the last volution, hav- 

 ing eight teeth within, three in the outer lip, three, of which 

 two grow together, in the inner lip, one in the upper and one in 

 the lower angle ; last volution bicarinated, the upper carina small, 

 forming the lower angle of the small, oblique umbilicus. 



4. Natica pa^M^« ; Testa suborbicularis, subdiscoidea, spira 

 brevissima, anfractibus quatuor, superioribus fere obtectis, ulti- 

 mo maximo, superne rotundato, subtus rotundato-carinato ; um- 

 bilico patulo, callo columellari spiral), apice planulato : apertura 

 magna, ultimo aufractu superne interrupta, infra oblique producta. 



A single specimen of this shell has been kindly lent to us by Mr. 

 Millard, of Bristol, who is not acquainted with its locality : we 

 have seen another specimen in Mr. De Ferussac's collection, which 

 M^as brought from South America by M. De Humboldt. 



Shell suborbicular, rather discoid, with a very short spire; vo- 

 lutions four, the upper ones nearly covered, the last very large, 

 rounded above and its lower edge rather keeled, with a very 

 rounded keel ; umbilicus spreading, its columellar callus spiral, 

 flattened at its lower end : aperture large, interrupted at its upper 

 part by the last volution, obliquely produced at the lower part. 



5. ^lki\&\\\d Icevissima. Testa oblonga acute conica, anfractibus 

 septcnis, convexiusculis, laevissimis, olivaceis, longitudinaliter in^r 

 terrupte fusco-fasciatis ; suturis laevibus; apertura suboblonga, su- 

 perne acuta ; labio columellari, praecipue superne, incrassato. 



Shell oblong, acutely conical, whorls seven, slightly convex, 

 very smooth, olive green, with interrupted longitudinal dark 

 brown bauds ; sutures smooth ; ai)ertuie rather oblong, upper part 

 pointed; columellar lip thickened, particularly at its upper ex- 

 tremity. 



This shell was found in abundance adhering to the stones form- 

 ing the bed of the rivulet (Rio de la Guayra) which runs through 

 La Guayra. Two specimens have been presented io the British 

 Muscuni, by Idw N. II. Cheyne. 



