CALLISTOPLEPA. 127 



both of his new genus and of its type, and gives only the 

 scantiest of descriptions, cannot expect to appear to the best 

 advantage in subsequent works. 



1. C. SHUTTLEWORTHI Pfeiffer. PI. 47, figs. 18, 19, 20. 

 Shell ovate-conic, very thin, submembranaceous, very 



closely chordate-plicate, silky, corneous, banded with rufous 

 spots at the suture and periphery, the rest of the surface 

 streaked with pale rufous. Spire conic, obtuse. Whorls 5%, 

 a little convex, the last a little longer than the spire. Colu- 

 mella rather narrow, compressed, obliquely truncate at the 

 base. Aperture oblique, truncate-oval; peristome simple, 

 thin. Length 34, diam. 17, aperture 19 x 11.5 mm. (Pfr.) . 



Length 27, diam. 14.5 mm. (d'Ailly). 



West Africa : Grand Bassam ( Verreaux) ; Kamerun at 

 Bonge and N'dian (Sjostedt). 



Achatina shuttleworthi PFR., P. Z. S., 1856, p. 34 ; Monogr., 

 iv, p. 603. Ganomidos shuttleworthi (Pfr.) D'AILLY, Moll, 

 terr. et d'eau douce de Kameroun, Bihang, etc., xxii, 1897, 

 p. 69, pi. 3, f. 11-14. 



D'Ailly remarks that the diagnosis given by Pfeiffer does 

 not mention the spots of pale whitish-yellow which give the 

 shell a beautiful appearance. They have an enamelled, 

 opaque appearance, and occur almost exclusively at the apices 

 of the arrow-shaped spots of the characteristic peripheral 

 and subsutural girdles. They are produced by the transfor- 

 mation of the substance of the fine riblets, while the spaces 

 between these riblets retain the general color of the shell. 

 The surface is often corroded on these spots. The axial 

 sculpture is very strongly developed and regular, while the 

 spiral striae are extremely fine. 



2. C. BARRIANA (Sowerby). PI. 47, figs. 14, 15, 16, 17. 

 Shell ovate-conic, thin, corneous, banded with small brown 



spots at the suture and periphery, and sprinkled here and 

 there with small whitish spots. Spire conic, the apex obtuse. 

 Whorls 6, a little convex, the upper ones smooth, the rest very 

 densely lirate, lirae rugose; last whorl longer than the spire, 



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