The Non-Marine Mollusca of Portuguese East Africa. 



211 



the same general type as in other specimens of Assiminea from Natal 

 identified as A. sinica Nevill and A. ovata (Krs.). These species all differ 

 from the British form, A. grayana Leach, as well as from the Indian species 



Text-fig. 28. — Assiminea bifasciata Nev., Isipingo, Natal. 

 Half of a transverse row of teeth from the radula ; X 600. 



figured by Annandale and Prashad,* and at least some of the Chinese forms, f 

 in having no basal cusps or denticulations on the sides of their central teeth. 



Assiminea leptodonta Conn., 1922. 



(Plate IV, fig. 31.) 



1922. Assiminia leptodonta Conn., A.M.N.H. x, p. 122. D. 

 Hab. L. Marques. Estuary of Nkomati River (Junod). 

 The radula (text-fig. 29) measures about -95 mm. in length, and contains 

 75 rows of teeth in one specimen and 71 in another. There seem 



Text-fig. 29. — Assiminea leptodonta Conn., Lebombo Marsh, Rikatla. 

 Half of a transverse row of teeth from the radula ; X 600. 



to be eleven teeth in each transverse row, which is more than we usually 



* Rec. Ind. Mus., vol. xvi, 1919, p. 249, text-fig. 4. 



t Heude: Mem. Hist. Nat. de I'Empire Chinois, vol. i, Moll. Terr., 1882, pi. xxi, 

 figs. 4c, 5c, 6c. 



