184 Mr, II. 13. Pieston on netv SJieUs from 



Aperture : alt. 26, diam. 13 mm. 



Huh. (of type). Bitze, near the River Ja, Cameroons ; 

 Bpecimens were also collected at Akok, 30-35 miles fVom the 

 coast at Kiibi. 



In some nspects resembling F. mrn-tensi, d'Ailly * ; the 

 present shell is, hoAvever, of a lighter texture, there is practi- 

 cally no basal zone of deeper coloration, and the peristome is 

 always livid purple in colour, whereas M. d'Ailly makes a 

 great point of the constant whiteness of the peristome in his 

 species. 



Pseudachaiina nodosa, Preston, var. emiaenSy nov. 

 (l^^ig- 11.). 

 Much more elongate than the typical form, tlie keels on 

 the last whorl are even more obsolete, and the columella n 

 Jess curved. 



Alt. 89, diam. maj. 37-5 mm. 



Aperture: alt. 33, diam. 17 mm. 



Hah. Bitze, near the liiver Ja, Caraeioons. 



Pseudotrochus hatesi, sp. n. (Fig. 12.) 



Shell oblong-turrite, thin, pale flesh-coloured, transversely 

 banded, spotted, and tessellated with chestnut-brown and 

 crtamy white, covered with a very thin pale yellowish-brown 

 periostracum ; apex flattened; whorls 6^, the embryonic 

 whorls subniamillary and presenting under a lens a weathered 

 appearance, the later whorls regularly furrowed with closely 

 set, broad, very flat, spiral ridges, and sculptured with very 

 line, wavy, spiral striee, crossed by irregular lines of growth, 

 somewhat angled above the periphery ; periphery strongly 

 but bluntly carinate; sutures impressed, lightly crenulate, 

 narrowly margined, whitish ; base of shell convexly elon- 

 gate ; columella slightly excavated above, twisted at base, 

 reddish brown and diffused into a callus, which joins the lip 

 above and continues as a jarietal callus throughout the in- 

 terior of the shell ; jjeristome angled, sharply acute ; aperture 

 nearly quadrate. 



Alt. 51"5, diam. maj. 30 mm. 



Aperture: alt. 21*5, diam. l."i-5 mm. 



IJab. Bitze, near the liiver Ja, Cameroons. 



Type in British Museum. 



A very remarkable shell, whose nearest ally appears to be 



* ' Bihang till Kongl. Svenska Vetenskaps-Akadeniieus Handlingar,' 

 22, Afd. 4, no. 2, 1896, pp. 9o-98. 



