150 LITTORINID^. 



Cincfula denticiilata, Fleming, Brit. Anim. p. 306. — Brit. Marine Conuli. p. 771- 

 Rissou ,, Brown, Illust. Conch. G. B. p. 1 1 (pi. !», f. iJO '^). 



A conic, subpellucid, white shell, with six volutions terminat- 

 ing in an obtuse point, furnished with nine or ten coarse ribs, 

 that project at the top of each spire, forming strong indentations 

 like the preceding species {conifera) ; aperture suborbicular, 

 outer lip thickened by a rib ; pillar-lip smooth, indented with 

 one or two small tubercles at the base adjoining the ribs. 

 Length not quite a quarter of an inch ; breadth one-half its 

 length. 



Supposed to he exotic, hut is not known to us. Stated to have 

 heen received hy Montagu from Wepmouth {that once prolific 

 source of spuriously native species), along with conifera, and to 

 hear much general likeness to that shell, yet to differ from it hy its 

 more conic shape, its fewer and stronger rihs, which form deeper 

 sutural denticidations, are not undulated hut simply ohlique, and 

 are separated hy smooth intervals ; and by its more orhicidar, and 

 not truly marginated hut simply thichened aperture. The various 

 descri2)tions of this shell appear to he derived from the original one 

 in the " Testacea Britannica" but hoik Wood and Brown have 

 delineated a shell under this appellation. The minuteness of the 

 scale on tvhich the former has exhibited the species is an effectual 

 bar to the recognition of the object intended ; the other engraving 

 referred to displays a shell that seems allied rnost closely to 

 Brjerea, but is shorter and less closely ribbed, and agrees very 

 fairly with a Jamaica species called subangulata hy our friend, 

 Professor Adams, in his correspondence. The tubercles upon the 

 pillar referred to by Montagu are neither x>resent in that shell, nor 

 delineated in Brown's engraving : hence we dare not assert the 

 identity of the figured specimen with MontagxCs lost type. 



