80 COCHLITOMA. 



Length 145, diam. 70, aperture 80 mm. 



Length 130, diam. 64, aperture 68 mm. 



Length 105, diam. 49, aperture 55x28 mm. (Pfr.). 



S. Africa: Woods in Outeniqualand, George District 

 (Krauss) ; Natal (Dr. Wahlberg). Pondoland (Conrad 

 Beyrich). Howick; frequent in the Maritzburg district 

 (E. W. Swanton). 



Achatina zebra var. granulata KRAUSS, Die Sudafrikanis- 

 chen Mollusken, p. 80 (1848). A granulata PFR,, P. Z. S. 

 1852, p. 66 ; Monogr. iii. p. 484. SEMPER, Reisen im Archip. 

 Phil., LandmolL, p. 143, pi. 12, f. 2 (genitalia) ; pi. 16, f. 14 

 (teeth. MARTENS, Archiv f. Naturg. 1897, p. 36; Sitzungsber. 

 Ges. nat. Fr. 1890, p. 87. SWANTON, Journ. of Conchology 

 x, p. 195 (July, 1902). A semigranosa PFR., P. Z. S. 1861, 

 p. 25; Mai. Bl. 1861, p. 78; Monogr. vi, p. 216 (young of 

 granulata; cf. Smith, Ann. Mag. (6), vi, p. 391). 



Readily known by its conspicuously granulate spire, a 

 little attenuated near the obtuse apex, the concave, narrow 

 and peculiarly compressed columella, etc. Different as are the 

 adult shells, the young show relationship with C. semidecussata. 



2. C. SEMIDECUSSATA ('Mke.' Pfr.). PL 30, fig. 51, 52, 53. 



Shell ovate-turrite, rather thin, white under a greenish- 

 yellow cuticle, irregularly marked with well-spaced chestnut 

 stripes, which are often interrupted or zigzag. Sculpture of 

 fine, close, more or less waved rib-striae, cut into granules by 

 decussating spirals, this sculpture much weaker below the 

 periphery, and usually coarser below the suture. Whorls about 

 8, convex. Spire regularly tapering to the large, obtuse, 

 rounded apex. Aperture narrow above and below, pearly 

 bluish and showing the dark streaks within; outer lip thin; 

 columella whitish, gently concave above, straight below, and 

 abruptly truncate. Parietal callous transparent, very thin. 



Length 75, diam. 32, aperture 38 mm. 



Length 70, diam. 29, aperture 33 mm. (Pfr.). 



S. Africa: Natal (Mke.), Upper Olifants river, north of 

 Middelburg, Transvaal. 



A. semidecussata Mke. MSS., PFR., Symbolae iii, p. 91 



