148 UNIVALVES — TROCHUS. 
Reversed Shells. 
Scientific Name. Locality. Common Name. 
Perversus «+++ ++: Mediterranean ------+-- Reversed Trochus 
Pusillus --.+---- East Indies ---+---+-++- Minute --» do-- 
Undulatus ----- © Ditto. ---cercccvecscsee Waved ---do-- 
Ventricosus -+--> Ditto «0 cece cccrcccsvcce Bellied --- do.-- 
Annulatus «--+:- Ditto ----- erces verses ce Annulated - do -- 
sba0C ccensaaesicnseie sce  Hornacolorddose 
Lunaris -:cese2e 
