FROM TANGANYIKA AND KENYA 141 



Family ACMAEIDAE Carpenter 1857 



Genus SCURRIOPSIS Gemmellaro 1879 



Subgenus DIETRICHIELLA Wenz 1938 



Scurriopsis {Dietrichiella) kindopensis (Dietrich) 

 PI. 22, figs. 4a, b 



1914. Patella kindopensis Dietrich : 116, pi. 11, fig. 3. 



1932. Scurria (Dietrichiella) 3 kindopensis (Dietrich) ; Haber : 220. 



1938. Scurria (Dietrichiella) kindopensis (Dietrich) ; Wenz : 219, fig. 405. 



Material. One specimen (no. G. 48913). 



Locality and horizon. Kindope valley, N.W. of Tendaguru, Tanganyika ; 

 Upper Kimmeridgian, " Trigonia smeei " Bed. 



Remarks. This small patelliform gastropod, which is 11-3 mm. long and 7-2 mm. 

 broad, is a little larger than Dietrich's holotype, but agrees with it in shape and orna- 

 ment. The latter consists of concentric rugae and of scarcely perceptible radial 

 grooves confined to the neighbourhood of the posterior margin. The apex is placed 

 at about one-sixth of the length of the shell from its anterior end, the longitudinal 

 profile from it to the posterior end forming an evenly convex curve. 



Superfamily TROCHACEA 



Family TROCHIDAE Rafinesque 1815 



Subfamily PROCONULINAE Cox i960 



Genus AFRICOCONULUS nov. 



Diagnosis. Shell slightly coeloconoid, well elevated, anomphalous ; last whorl 

 with two tuberculate or spinose carinae at periphery, the upper and stronger carina 

 forming prominent angulation, the lower one just visible at suture on spire whorls; 

 remainder of surface ornamented with simple or beaded spiral cords and raised 

 collabral threads ; base low, rather flattened ; columellar lip short, simple, describing 

 a broad curve abapically to merge with basal lip. 



Type species. Proconulus spinatns Dubar (1948 : 126, pi. 10, figs. 7-9), Middle 

 Lias, Morocco. 



Remarks. In this genus the ornament is rather like that of Eucychts, but the 

 depressed base and the shape of the aperture indicate that there is no real affinity 

 with that subgenus. Dubar was undoubtedly correct in detecting some affinity 

 between his species, taken as its type, and Proconulus, but in typical species of that 

 genus the whorls lack prominent peripheral carinae and have only weak spiral 

 ornament. There is much resemblance between the new genus and Metaconulus 

 Cossmann, of the Lower Tertiary, but it is to be assumed that this was due to con- 



3 As published by Haber, this subgeneric name was a nomen nudum. 



