CLAUSILIA. 119 



Clausilia cordata, FoRST. Nov. Act. Leopol.vol. xix. (1841) p. 269, pi. 58, f. 1. 

 „ vulnerata, FoRST. Nov. Act. Leopol. vol. xix. (1841) p. 270, pi. 58, 



f. 2. 

 „ infulcBformis, Forst. Nov. Act. Leopol. vol. xix. (1841) p. 272, pi. 58, 



f. 3. 

 „ radicans, Forst. Nov. Act. Leopol. vol. xix. (1841) p. 273, pi. .)8, 



f. 4. 

 „ rosirata, Forst. Nov. Act. Leopol. vol. xix. (1841) p. 274, pi. 58, 



f. 5. 

 ,, (juadrata, Forst. Nov. Act. Leopol. vol. xix. (1841) p. 275, pi. 58, 



f. 6. 



Shell fusiform, not very strong, a little transparent, 

 greyish-brown, occasionally streaked with linear whitish 

 or cinereous longitudinal markings, with distinct and 

 numerous well-raised fine costellse, which become rather 

 distant near the mouth, and are neither crowded nor at all 

 granulated. Whorls about twelve, rather flat, but well 

 defined by a profound suture ; the last whorl with the 

 basal crest, or external fold, prominent ; spire rather 

 quickly attenuated, apex moderately blunt. Aperture 

 subpyriform-oval, or oboval, canaliculated at the base ; 

 peristome continuous, whitish, raised all round, expanded, 

 slightly produced, sublabiated, the outer lip not sim})ly 

 arcuated, but subangulated below. Upper lamella very 

 distinct, submarginal, nearly adjacent to the outer lip ; 

 lower lamella more deeply seated, approaching the pre- 

 ceding as it recedes inwards, not lying low down in the 

 aperture. Lunella, or inner basal lamina thin, but distinct 

 when the shell is held up to the light, as likewise are the 

 two inwardly converging thread-like palatal folds, of which 

 the second, which lies about the middle of the outer lip, 

 is the shorter and stronger. Occasionally two additional 

 minute, short laminar denticles intervene between the folds 

 upon the pillar lip. 



Usually two-thirds of an inch long, but occasionally 

 three-quarters. 



