ARCHACHATINA. 119 



becoming whitish below, under a greenish yellow cuticle, ele- 

 gantly ornamented with longitudinal brown flames, which 

 widen downwards and become confluent at the base, where 

 they are blackish. Whorls 6, convex, the lower two girt with 

 an impressed line below the suture, last whorl longer than 

 the spire; spire conic, obtuse. Aperture oblong-ovate, white 

 within,' the lip edged with a brown border ; columella arcuate, 

 callous, glossy and white. Length 2 inches 11 lines, width 

 1 in. 8 lines, apert. 1 in. 10 lines (Jonas). 



West Africa: Liberia (Schepman) ; Kamerun at Etome 

 (Dusen) and Bonge (Sjostedt). 



Breitwelligte duenne Kinkhorn, KNORR, Vergnuegen etc., 

 iii, p. 11, pi. 3, f. 1. Ackatina knorrii JONAS, Archiv f. 

 Naturg. 1839, i, p. 345. PFR., Monogr. ii, 250; iii, 485; iv, 

 601; vi, 214; Conchyl. Cab. p. 365, pi. 47, f. 11, 12. SCHEP- 

 MAN, Notes Leyden Mus. x, 1888, p. 247. d'AiLLY, Bihang 

 etc. p. 63 (1897). DOHRN, Jahrb. d. D. Mai. Ges. v, 156.- 

 Achatina prunum REEVE, Conch. Icon, v, pi. 4, f. 13 

 (Feb., 1849). 



The original description is given above. It is a much 

 smaller, thinner and more delicate shell than A. marginata, 

 the thin lip is unexpanded, and the surface of the last whorl 

 is but weakly decussate. 



The typical form is obese, with the last l 1 /^ whorls yellow 

 or greenish-yellow, with wide purple-brown zigzag and 

 straight stripes, broader and often coalescent below, most 

 or all of them reaching to the suture above, where most of 

 them split. The suture has a tessellated border on the last 

 two or three whorls. The whole spire is commonly dull rose 

 colored, but rarely pale. The aperture takes in .6 or more 

 of the total length of the shell. The columella is white or 

 lead-whitish. A well-grown shell measures, length 72, diam. 

 39, aperture 43.5 mm. 



14. A. CAMERUNENSIS (d'Ailly). PI. 23, figs. 13-16. 



Shell oblong-ovate, thin, with a silky luster, everywhere 

 decussate, closely and distinctly granulate, the granules some- 

 times weaker, though still distinct, below the periphery. 



