British and German East Africa^ <i;c. 533 



one more in tlie presont s[)ecies, are vatlier flatter and the 

 transjiarent peripheral band is hicking. 



Alt. 1225, diam. niaj. 5 mm. 



Apeiture: alt. diam. 2'25 mm. 



Hub. Sliimbi Hills, British East Africa. 



Achatina tredalei, sp. n. (Fig. 20.) 



Shell ovately fusiform, moderately solid, the earlier wliorl.^ 

 pink, the latter covered with a brownish periostracum, and 

 painted with broad, irregular, somewhat distant and oceasion- 

 ally much broken, transverse chestnut bands and flame- 

 markings; whorls 7, regularly increasing, rather flattened, 

 decussately sculptured, the sculpture becoming obsolete to- 

 wards the base ; sutures impressed, crenellate and narrowly 

 margined below; columella bluish white, a very thin callus 

 joining it with the sutural region just inside the aperture, 

 slightly excavated, descending nearly vertically ; labrum 

 sim})le, acute; aperture rather narrowly, elongatoly ovate, 

 interior of shell bluish white. 



Alt. 101, diam. 41 mm. 



Aperture: alt. 48, diam. 29 mm. 



Ilab. Shimbi Hills, Bj itish East Africa. 



Curvella caloraphe, sp. n. (Fig. 21.) 



Shell ovately fusiform, perforate, rather solid, wliitlsh, 

 glossy ; whorls 5, the first four flattish and finely sculptured 

 with transverse, moderately closely set, arcuate stria?, the 

 last more convex and sculptured with much more closcdy set, 

 arcuate stria? ; sutures impressed, broadly margined below, 

 especially on the la^^t whorl ; umbilicus narrow, deep, partly 

 concealed by the reflexion of the columella ; columella white, 

 outwardly expanded, bulging inwardly towards the centre, 

 excavated below and diffused above into a thin, ill-defined, 

 parietal callus which reaches the upper margin of the labrum ; 

 labrum acute, sli;::htly reflexed bt low, dilated in front and 

 then receding above; aperture inversely auriform; interior 

 of shell white, showing the closely set, transverse sculpture 

 tlirouirh the test. 



Alt. 11*5, diam. maj. G'5, diam. min. 5 mm. 



Aperture : alt. 7, diam. 8 mm. 



JIah. Sliimbi Hdls, British East Africa. 



DiU'ering from P. v>/assana, Smith, chiefly by its wider 

 aperture, excavated columella, and in having the sutures 

 noticeably margined, which is not the case in that species. 



