TJie Non-Marine MoUusca of Portuguese East Africa. 183 



differ slightly in size and contour, the type set being more slender and that 

 from Zomba more obese, but there is not sufficient difference to merit even 

 varietal distinction between any of them. The shells from Portuguese 

 territory resemble those from Zomba in being larger and slightly more 

 obese than the type, but are quite conspecific with it. 



Curvella disparilis (Smith), 1890. 



1890. Bulimus {Hapalus) disparilis Smith, A.M.N.H. vi, p. 156, pi. 5, 

 fig. 13. D.F. 



Hab. L. Marques. Mtisherra R. Valley ; Dondo District ; Zangwe 

 Basin (Cressy). 



Described from Mamboia and also recorded from Usagara, both localities 

 in Tanganyika Territory. 



Curvella quisqualis (M. and P.), 1892. 



1892. Buliminus quisqualis M. and P., A.M.N.H. ix, p. 90, pi. 5, fig. 10. 

 D.F. 



Hab. Mozambique (Layard). 



Genus Euonyma M. and P., 1896. 



Euonyma lanceolafa (Pfr.), 1854. 



1854. Bulimus lanceolatus Pfr., P.Z.S., p. 292. D. 



1910. Euonyma lanceolata Pfr., Conn., A.M.N.H. vi, pp. 260-261. N.F. 



Hab. L. Marques. Near Delagoa Bay (in British Museum). 



Euonyma crystallina (M. and P.), 1896. 



1896. Subulina crystallina M. and P., A.M.N.H. xviii, p. 316, pi. 16, 

 fig. 4. D.F. 



Hab. Lebombo Marsh, Rikatla (Junod) ; Masiene (Lawrence). 



Specimens from the above localities are quite in agreement with this 

 common Natalian species, whose extension northward along the coast is 

 by no means remarkable. 



Genus Opeas Albers, 1850. 



Opeas praecox sp. n. 



(Plate IV, fig. 25.) 



Shell of fair size, elongate turriform, narrowly rimate, thin, smooth, 

 glossy, transparent, pale olivaceous. Spire produced, apex narrowly 



