

AN 



INTRODUCTION 



Division of Mollusk« 

 Sectioned Library- 



CONCHOLOGY; 



OR, ELEMENTS OF 



THE NATURAL HISTORY OF 



MOLLUSCOUS ANIMALS. 



GEORGE JOHNSTON, M.D., LL.D., 



^nLLOW OF THE ROYAr, COLLEGE OF SURGEONS OF EDINBURGH. 



LONDON: 



JOHN VAN VOORST, PATERNOSTER R 



M.D.CCCL, 



X 



