﻿114 



PROCEEDINGS OF THE NATIONAL MUSEUM 



Figure 45. — Animal characters of four genera of Thiaridae: a, Thiara (Tarebia) granifera 

 (Lamarck), from Lithia Spring, Fla., and the Orient; b, Hemisinus cubanianus (Orblgny), 

 from Cuba; c, Pleurocera catenana (Say), from Florida springs; d, Pachychilus glaphyrus 

 (Morelet), from Honduras. (From left to right: Mantle edge, central radular tooth, 

 outer marginal tooth, and operculum.) 



