152 ACT.EON. 



A. ALJ5US 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. (Soivb.). 



Port Elizabeth, S. Africa. 



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

 of Conch. 1886, v, p. 15. — Adaon aUms Sowb., Marine Sh. S. Af., 

 p. 51. 



A pure white seinitransparent 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 puneto-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. 225 mill. (Sm.). 



St. Helena. 



A. semisculptm E. A. Smith, P. Z. S. 1890, p. 298, pi. 24, f 8. 



The spiral transverse punctured stride do not extend above the 

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

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



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.'). 



Month 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 jjinkish with a light girdle 



