The Intermediary Hosts of the Human Trematodes, Schistosoma hæmatobium and Schistosoma mansoni in Nyasaland Protectorate

Abstract

I HAVE received a letter enclosing two tubes containing specimens of five species of fresh-water molluscs from Capt. W. H. Dye, Medical Officer, Karonga, Nyasaland, British Central Africa. Capt. Dye writes: “I think I can say that the enclosed specimens represent all the fresh-water molluscs to be found in this district, as I have searched most thoroughly.”