18G On neio Shdls from East and West A/rira, (tr. 



Hah. (of type). Akok, 30-35 miles from tlic coast at 

 Kvibi, Cameroons ; specimens also occurred at Bitze, near 

 the River Ja. 



Allied to P. clavata, Gray, from which it differs by its 

 more cylindrical form and the very fine sculpture of the 

 embrvonic whorls, which in P. clavata are much more coarsely 

 costate ; the last whorl and the aperture in the present species 

 are also much longer. 



Homorus foveolatns, sp. n. (Fig. 15.) 



Shell narrowly subulate, dark brown, smooth, polished, 

 shining; apex mammillate ; whorls lOi, flattish, irreii:ularly 

 marked with fine oblique growth-liiies, the last whorl some- 

 what carinate at the peripiiery ; sutures well impressed ; 

 columella descending in a curve, abruptly truncate, extending 

 into a callus which joins the lip above ; peristome simple, 

 acute ; aperture ovate. 



Alt. 16'25, diam. maj. 3*5 mm. 



Aperture : alt. 2, diam. 1 mm. 



Hah. Akok, 30-35 miles from the coast at Kribi, (cameroons, 



Suhulinajaensis, sp. n. (Fig. 16.) 



Shell bluntly subulate, thin, light yellowish flesh-colour, 

 subniammillate at the apex ; whorls iS^, rather flat, the first 

 two and a half smooth except for a minute infrasutural plica- 

 tion, the last six whorls closely transversely striate ; sutures 

 subcrenulate ; columella curved and twisted; peristome 

 acute ; aperture elongately ovate. 



Alt. 18"75, diam. maj. 4"25 mm. 



Aperture: ait. 3'7.5, diam. 1*5 mm. 



Hab. Bitze, near the River Ja, Cameroons. 



Fitcheria messageri, sp. n. (Fig. 17.) 



Shell thin, elongately oblong, marked faintly with con- 

 centric lines of growth, covered with a smooth pale olive- 

 green periostracum j teeth small ; posterior side very obtusely 

 rostiate; anterior side somewhat acutely rounded; dorsal 

 margins sloping, especially anteriorly ; ventral margin 

 rounded centrally, slightly excavated posteriorly. 



Long. 15, lat. '26'b mm. 



iiab. Senegal River. 



Fischeria ajyprorimans, sp. n. (Fig. 18.) 

 Shell thin, elongately ovate, dark olive-green painted with 



