Freshioater Fossils from Central South Africa. 24.3 



Locality. S. side of Sliangaui Rivei Hats on road to Lul)ii 

 (Bubi District). 



Rock no. 1351, — Near the mar<^in of a central depres- 

 sion in this rock is a crowded gronp of minute C'/iara-stenis 

 of smaller diameter than those re})reseiitod in no. 1352. In 

 close proximity is a well-])reserved oval fruit of medium size 

 as well as fruit-cavities of minute size ; obscure Gastropod 

 remains are also present, but too indefinite ibr identitication 

 (PI. VIII. fig. 2). Similar structures are also displayed in a 

 microscopical section of this rock, especially a stem-section 

 cut transversel}', exhibiting about fourteen minute tubular 

 apertures surrounding a moderately wide central canal 

 (PI. VIII. fig. 7). 



Locality. N. flank of Kana Valley on road to Lubu (Se- 

 bungwe District). 



Rock no. 1352. — On the surface of this rock are displayed 

 some narrou^, fragmentary, flattened stems of Chara (PI. Vlll. 

 fig. 4), less than a millimetre in diameter, bearing the equi- 

 distant, longitudinal, rounded ridges and furrows cliaracteristic 

 of that genus; the stems also exhibit a system of branching 

 with obscure thickenings at the joints, wliile at their exposed 

 transverse ends are indications of the central tube and sur- 

 rounding minor tubes or cells which are so typical of Chara 

 morphology. No fruits are directly associated with the stem.s, 

 although there is a large, rather coarse, and spirally ridged 

 ovate body lodged in a small cavity quite close to some stem- 

 fragments, which represents an oogonium or fruit (PI. VIII. 

 fig. 5). Besides the plant-remains are some minute Gastro- 

 pods with faint longitudinal striations, too obscure for deter- 

 mination, although the larger form, measuring 3 mm. in 

 lleight and diameter, with a wide base and short conical spire, 

 belongs to Vivipariis (PI. VIII. fig. 1 a), while another with 

 an elongate spire and a more or less cylindrical axis, mea- 

 suring 2'5 mm. in height and less than 1 mm. in diameter, 

 may be a Paludestrina (PI. VIII. fig. 1/'). There is another 

 and somewhat different Paludestriniform shell on the surface 

 of this rock of rather similar dimensions, giving a tairly com- 

 plete dorsal outline (PI. VIII. fig. 3) with a lengthy spire. 

 These specimens exhibit no internal characters of the aperture, 

 being firmly embedded in the siliceous nuitrix and yielding- 

 only dorsal views. 



Locality. Kana Umzola, N. flank of Kana Valley on road 

 to Lubu (Sttbungwe District). 



17* 



