TJie Non-Marine Mollusca of Portuguese East Africa. 165 



Nesopupa (Afripupa) vengoensis sp. n. 

 (Plate IV, fig. 23.) 



The minute shell is almost an exact replica of N. griqualandica 

 (M. and P.),* but is slightly less strongly striate, and differs clearly and con- 

 stantly in dentition, the lower palatal fold being absent and the basal tooth 

 so much more deepset that in some specimens it is hardly visible. 



Ijong. 1-6, lat. 0-8 ; apert. alt. 0-5, lat. 0-5 ; last whorl 1-0 mm. 



Hab. L. Marques. Mount Vengo, 5500 ft. (Cressy). 



I would have been inclined to regard this race as merely a subspecies 

 of griqualandica, were it not that the exact number of palatal folds is now 

 considered of sectional importance in the genus Pfychotrema, so should 

 presumably be of at least specific importance in the Pupillidae. 



Nesopupa (Afripupa) bandulana Conn., 1922. 

 (Plate IV, fig. 24.) 



1922. Nesopupa bandulana Conn., A.M.N.H. x, p. 119. D. 



Hab. L. Marques. Bandula Siding, B. and M. Rly. (Mcdowell). 



Nearly allied to N. bisulcata rhodesiana Pilsb.,f but easily separable by 

 having a more prominent sinulus, much fainter sculpture, and the extra 

 denticle on the left of the base. 



Genus Truncatellina Lowe, 1852. 

 Truncatellina sykesi (M. and P.), 1893. 



1908. Pupa sykesii M. and P., A.M.N.H. i, p. 81, pi. 2, fig. 20. N.F. 



Hab. L. Marques. Mount Vengo, 5500 ft. (Cressy). 



Of the only two examples, one is immature and the other somewhat 

 abnormal, tapering more noticeably than usual. I do not consider, how- 

 ever, that they are separable from the south-eastern form. 



Family ACHATINIDAE. 



Subfamily ACHATININAE. 



Genus Metachatina Pilsbry, 1904. 



Metachatina hraussi (Pfr.), 1846. 



var. elongata (Junod), 1899. 



1899. Livinhacia hraussi, var. elongata Junod, Bull. Soc. Vaudoise, xxxv, 

 p. 279. N. 



Hab. L. Marques. Rikatla (Junod) ; Delagoa Bay (juv., Barnard). 



* A.M.N.H. xi, 1893, p. 22, pi. 3, fig. 9. 



t Man. Conch, xxv, 1920, p. 360, pi. 34, figs. .5-6. 



