East and West Africa and the Transvaal, 183 



Achatina variegafa, Lk., var. gracilis^ nov. 



Shell less swollen and proportionately much narrower than 

 is the case with the typical A. variegata ; the whorls are 

 also rather more convex and the painting less regular. 



Alt. (about) 120, diani. maj. (about) 58 mm. 



Ilab. West Africa. 



Callistoplepa tiara, sp. n. (Fig. 9.) 



Shell oblong-ovate, thin, corneous, {)ale chestnut, orna- 

 mented on the upper whorls with zigzag transverse streaks 

 of purplish brown wiiich become tbiclcened and deepened in 

 colour just above the sutures, so as to appeal* as a super- 

 sutural row of squarish dark purple blotches, and which are 

 continued on the body-whorl as a peripheral interrupted band ; 

 the last two whorls are also painted witli irregular cream- 

 coloured patches; whorls G, sculptured with tine, wavy, spiral 

 strise crossed by irregular transverse ridges, giving to tlie 

 shell a finely granular appearance ; the sculpture, tliough 

 continued towards the base of the shell, becomes obsolete 

 below the periphery ; sutures impressed, subcrenulate ; colu- 

 mella straight, dark purple; peristome simple, acute; aper- 

 ture elongately inversely auriform. 



Alt. 49, diam. maj. 25'25 mm. 



Aperture : alt. 30' 75, diam. 13*5 mm. 



Ilab. Bitze, near the River Ja, Cameroons. 



Pseudachatina nodosa, sp. n. (Fig. 10.) 



Shell ovate-conic, moderately thin, painted above with 

 broad brownish-purple transverse flame-markings, between 

 which the pale flesh-colour of the shell is visible, covere.l on 

 the lower whorls with a thin, scaly, yellowish-brown peri- 

 ostracum ; whorls T^j the first three granulated with fine 

 spiral stria3 crossed by irregular transverse lines, the remainder 

 irregularly coarsely nodulous, the last bearing two obsolete 

 keels about 9 mm. apart, the lower one situated at the peri- 

 phery ; sutures crenulate, soniewhcit lightly impressed ; colu- 

 mella obliquely curved, a thick callus, the outer margin of 

 which is tinged with purple, joining it with the lip above ; 

 peristome expanded, scarcely reflexed, livid purple ; aperture 

 obliquely inversely auriform ; interior of shell bluish white, 

 a broad purple band appearing on the upper portion of the 

 parietal wall. 



Alt. 61, diam. maj. 29 mm. 



