"^-'^2-'^^-/ ^ cX c/T^^^/^.-^-^yC 



i\yi JOHNSON 



A 



CONCHOLOGICAL MANUAL. 



BY 



G. B. SOWERBY, Jun, 



WITH NEARLY SEVEN HUNDRED ENGRAVED ILLUSTRATIONS. 



FOURTH EDITION, 

 CONSIDEKABLY ENLARGED AND IMPROVED, 



LONDON: 

 HEKET a. BOHN, TOEK STEEET, CO VENT GARDEN. 



MDCCCLII. 



