ACHATINA, WEST AFRICA. 11 



crenulate. Aperture about equal to half the length of the 

 shell, the columellar margin a little arcuate, bluish-white. 

 Length 148, diam. 65, aperture 69x35 mm. (Mts.). 



On the river Kuilu, an affluent of the Kassai, in the An- 

 gola hinterland, about 22 e. Ion. 



A. buchneri v. MARTENS, Jahrb. d. Malak. Ges., 1882, p. 

 245; -Conch. Mittheil., i, p. 138, pi. 26. 



Distinguished from A. achatina, which it resembles in 

 color and marking, by the want of red on the columellar 

 margin, the more lengthened contour, slighter convexity of 

 the whorls and smaller mouth. The suture is not accom- 

 panied by an impressed line. A. indotata Rve. has a broader, 

 blunter apex, thinner shell, more convex whorls, the upper 

 ones more strongly granulate, and the columella is more 

 strongly curved. Description and figure from v. Martens. 



3. A. WEYNSI Dautzenberg. PI. 17, fig. 17. 



Shell rather solid, elongate, ovoid. Whorls 8, the first 

 li/2 subplanate, the following convex, separated by a more 

 or less distinctly marginate suture ; the last whorl more than 

 two-thirds the total length. The surface is shining and ap- 

 pears smooth at first sight, but under a lens the early whorls 

 are seen to be finely punctate, and the following ones very 

 delicately shagreened. There are also, moreover, distinct de- 

 scending lines on the upper part of the last whorl and over 

 the whole of the preceding whorls. Aperture nearly half 

 the length of the shell, the lip acute and simple. Columella 

 nearly straight, a little twisted, obliquely truncate at the 

 base, the margins joined by a thin callous. Color white, 

 with very wide, zigzag, blackish-brown flammules, which 

 ordinarily tend to predominate, so that the last whorl some- 

 times seems to be black with some white lightning-stripes; 

 but they are always narrower below the suture, leaving a 

 lighter zone along the upper part of the whorls. The cuticle 

 is golden-yellow. The summit is purple-rose or deep violet, 

 nearly black. Columella and interior of the aperture cov- 

 ered with a bluish enamel, showing the flames by transpar- 

 ence. Length 93, diam. 50. aperture 47x30 mm. (Dautz.). 



