Note 343 — VI
Philip Askell Benton translation
The species adduced to confirm a correspondence between the molluscs of Lake Chad and of the Nile are:
Vivipara unicolor [the pond or river snail].
Melania tuberculata.
Corbicula fluminalis.
In addition to these, I found in a pool on the Yedseram the following varieties, which belong to the fauna of the Nile, and which were identified by Professor Dr. Boettger:
Ampullaria ovata (a very common species) [i.e. the apple snail].
Lanistes ovum.
Cleopatra bulimoides.
[Cf. [97].] [In Chevalier, Mission Chari-Lac Tchad, p. 459, there is an Appendix on Molluscs, with a plate at the end of the volume, and a Bibliography on p. 587.]