Sag = 
PLATE IV 
MEDICALLY IMPORTANT FRESH-WATER SNAILS 
nO. ee eee 
Bulinus truncatus (Audouin). 
Physopsis africana Krauss, 
Pomatiopsis (Oncomelania) hupensis (Gredler). 
Tarebia granifera (Lamarck). 
Melanoides tuberculata (Muller). 
Pomatiopsis (Katayama) nosophora (Robson). 
Parafossarulus manchouricus (Bourguignat). 
Fossaria truncatula (Muller). 
Planorbina glabrata (Say). 
Armigerus obstructus (Morelet). 
Biomphalaria boissyi Potiez and Michaud. 
Scale lines represent millimeters, 
