152 ACTION. 



A. ALBUS Sowerby. PI. 18, fig. 81. 



Shell oblong-ovate, subpellucid, white, transversely punctate sul- 

 cate throughout. Suture impressed. Aperture elongate-ovate ; col- 

 umella with one fold. (Sowb.*). 



Port Elizabeth, S. Africa. 



Tornatella alba SOWB., P. Z. S. 1873, p. 720, pi. 59, f. 6; Journ. 

 of Conch. 1886, v, p. 15. Action albus SOWB., Marine Sh. S. Af., 

 p. 51. 



A pure white semitransparent species, regularly grooved and 

 beautifully punctured throughout. (Soivb.). 



A. SEMISCULPTUS Smith. PI. 18, fig. 97. 



Shell ovate, turrited, small, shining, snow-white; very narrowly 

 rimate ; smooth above, rather distantly puncto-striate transversely 

 below the middle, and on the base more closely striated ; sculptured 

 longitudinally with a few indistinct, distant sulci. Whorls 4, lightly 

 convex, separated by a narrow channelled suture. Apex involute. 

 Aperture inversely ear-shaped, a little more than half the shell's 

 length ; columella narrowly reflexed, bearing a small fold at the 

 rimation. Alt. 4, diam. 2'25 mill. (SWi.). 



St. Helena. 



A. semisculptus E. A. SMITH, P. Z. S. 1890, p. 298, pi. 24, f. 8. 



The spiral transverse punctured striae do not extend above the 

 middle of the body-whorl. The longitudinal narrow and shallow 

 indistinct sulci apparently indicate lines of growth. (&). 



A. SENEGALENSIS Petit. PI. 18, figs. 90, 91. 



Shell elongated, cylindrical, thin, subpellucid, white. Spire tur- 

 rited, acute. Whorls 7, regularly transversely striated. Columella 

 obliquely uniplicate. Length 17, diam. 6 mill. (Petit.'). 



Mouth of the Gambia River, W. Africa. 



Tornatella senegalensis PETIT, Journ. de Conchyl. ii, p. 262, pi. 8, 

 f. 3. REEVE, Conch. Icon, xv, pi. 3, f. 14. 



The elongated form, thinness of the shell, and the obliquity of 

 the columellar fold are the distinguishing features of this form. 



A. TORNATILIS Linne. PI. 19, figs. 7-11, 15. 



Shell long-ovate, with conical acute spire and impressed sutures 

 the whorls but little convex. Color pinkish with a light girdle 



