Afrolittorina knysnaensis (Krauss in Philippi, 1847); family Littorinidae
G.W. Tryon
1887
<a rel="nofollow" class="external text" href="http://ia600302.us.archive.org/6/items/manualconch09tryorich/manualconch09tryorich.pdf">Tryon (1887), Manual of Conchology IX  – Solariidae (by William B. Marshall), Ianthinidae, Trichotropidae, Scalariidae, Cerithiidae, Rissoidae, Littorinidae; pl. 44 # 65</a>