The Non-Marine Mollusca of Portuguese East Africa. 121 



In 1881 he wrote : " Like several species of Ennea, this also varies 

 much in size. Those described by Dohrn were -^xl in., whilst the speci- 

 mens collected by Mr. Thomson are ^X ^^^^•" 



In 1899 he remarked : " Somewhat variable in size and in the develop- 

 ment of the upper of the two labral teeth. This in the type is somewhat 

 bifid or tuberculated, as described by Dohrn, whereas in the specimens in 

 the present collection it is simple, sometimes of the same size as the adjacent 

 too'th, but sometimes a trifle larger." 



The Maforga shells agree with those last mentioned by Smith from 

 Chiradzulu and Zomba Plateau ; the upper labral tooth is perfectly simple, 

 and I doubt whether they are not distinct from Dohrn's species. However, 

 the group of somewhat ordinary, smooth, 5-toothed shells, which includes 

 laevigata Dhrn., qumquedentata C. Bttg., and tudes and planidens Mts., is at 

 present in far too deeply involved condition for me to add another name, 

 until it has been possible to inspect large series of the last three species. 



The type of E. karongana Smith is an exact representative of typical 

 laevigata, showing fully the bifidity of the upper labral tooth, and must be 

 relegated to synonymy. 



Gulella nepia sp. n. 

 (Plate IV, fig. 7.) 



Shell small, cylindrical, rimate, smooth, glossy, pale olivaceous. Spire 

 produced, sides straight and parallel, apex very obtusely angulate. Whorls 6, 

 nearly flat, gradually increasing, devoid of sculpture save for a few distant, 

 irregular, oblique growth lines ; suture simple, shallow. Aperture sub- 

 quadrate, peristome reflexed, dentition 3-fold : a protruding, incurved, 

 not deeply entering lamella on the extreme surface of the paries at its 

 junction with the outer lip ; a small blunt tubercle, without any external 

 depression, slightly within the margin half-way up the outer lip, and an 

 exactly similar tubercle half-way up the columella ; callus rather thick. 



Long. 5-3, lat. 2-2 ; apert. alt. 1-3, lat. 1-1 ; last whorl 2-75 mm. 



Hab. L. Marques. Macequece District (Cressy). 



A member of the very small group, in which the principal columellar 

 process is situate half-way down the columella instead of at its upper angle. 

 The Kenyan G. pervitrea (Preston), perhaps its nearest ally, is an altogether 

 larger species. 



Gulella distincta (Melv. and Pons.), 1893. 



1893. Ennea distincta M. and P., A.M.N.H. xi, p. 22, pi. 3, fig. 10. D.F. 

 1898. „ exi^nia „ „ i, p. 28, pi. 8, fig. 8. D.F. 



Hah. L. Marques (?). Between Barberton and Delagoa Bay (fide 

 M. and P.). 

 19 



