Other Namibian references:

Brown, D.S., and B.A. Curtis.  1992.  Taxonomy of the freshwater
snail Afrogyrus anderssoni (Ancey, 1890, Planorbis) from Namibia
(South West Africa).  Journal of Molluscan Studies  58(4):443-446.

Brown, D.S., B.A. Curtis, and D. Rollinson.  1996.  The freshwater
snail Bulinus tropicus (Planorbidae) in Namibia, characterised
according to chromosome number, enzymes and morphology.
Hydrobiologia  317(2):127-139.

Brown, D.S., B.A. Curtis, S. Bethune, and C.C. Appleton.  1992.
Freshwater snails of East Caprivi and the lower Okavango River Basin
in Namibia and Botswana.  Hydrobiologia  246(1):9-40.

Curtis, B., K.S. Roberts, M. Griffin, S. Bethune, C.J. Hay, and H.
Kolberg.  1998.  Species richness and conservation of Namibian
freshwater macro-invertebrates, fish, and amphibians.  Biodiversity
and Conservation  7(4):447-466.


--
Kevin S. Cummings
Illinois Natural History Survey
607 E. Peabody Drive
Champaign, IL 61820
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http://www.inhs.uiuc.edu/cbd/collections/mollusk.html