196 ME. It. B. NEWTON OX NON-MABINE MOLLL'SCAN [June 1914, 



coasts of Tanganyika, and in the country off the southern end of 

 Lake Nj^asa. 1 



Occurrence. — At the basal fracture of the specimen the rock 

 is observed to be a light- coloured, minutely-perforated, calcareous 

 .sandstone. It was obtained from Bed 21 in association with 

 Laaistes and Chelonian remains. 



Locality. — Kachuku. 



Limicolaria sp. indet. (PI. XXX, fig. 17.) 



Remarks. — The collection contains two fragmentary examples 

 of this genus, belonging to different individuals. One consists of 

 a matrix-cast in which the four latest whorls have alone been 

 preserved. This fossil, measuring 35 by 20 millimetres, is of 

 oblong conico-turreted contour, and originally consisted of about 

 seven volutions, the last being nearly three times the height of the 

 penultimate ; the presence of an elongate suboval aperture with a 

 •c en trallv- excavated columellar margin mav also be noted. The 

 second specimen represents a summit-region composed of five 

 volutions, and measures 11 by 9 millimetres. It is furnished with 

 a round, depressed, and smooth apex, the succeeding whorl being 

 also smooth, while the third and fourth whorls are relatively deep, 

 •compressed, and ornamented with numerous microscopical, fine, and 

 slightly oblique stria tions ; the basal whorl is compressed and 

 sloping above, carinated at the centre, moderately inflated below, 

 and has an obliquely striated surface like the previous whorls, but 

 smooth below the carination ; aperture oval (fractured) and of 

 small size. 



The relationships of such fragmentary specimens are, of course, 

 •difficult to trace, although they would appear to be, with Limi- 

 colaria smithi Preston 2 a species of rather frequent occurrence on 

 the plateau areas that border the Victoria Nyanza, Dr. Oswald 

 having collected some recent specimens at Kisii. 



Occurrence. — The summit-fragment was found in Bed 8, 

 associated with Tropidophora nyasana and Cerastus sp. ; the larger 

 specimen came from Bed 31, accompanyingZ^of/^v'^M and other 

 vertebrates. 



Localities.— Nira (Bed 31) ; Kikongo (Bed 8). 



Family Bulimixldje. 

 •Cerastus cf. mcellendorffi Kobelt. (PI. XXX, figs. 15 <fc 16.) 



Cerastus moellendorffi, Kobelt, Abhandl. Senckenberg. Naturf. Gesellscb. vol. xxxii 

 (1909) pp. 15, 64 & pi. iii, tigs. 11-15. 



Remarks. — The collection includes a fairly good matrix-cast of 

 a form of Buliminidse which belongs undoubtedly to the genus 

 Cerastus of Albers (tyipe = BuUminus distans Pfeiffer), and 

 showing, moreover, certain resemblances to C. mcellendorffi from 

 iShoa and Somaliland (East Africa). The specimen is small, of 



i E. A. Smith, Proc. Zool. Soc. London, 1893, p. 634. 



2 Proc. Malac. Soc. London, vol. vii (1906) p. 89 & text-figure. 



