WILLIAM ELFORD LEACH, M. D. F. L, S. & W.S. 
Fellow of the Royal College of Physicians of Edinburgh, and of the Royal College of Surgeons, and of tlte Medico- 
cJiirurgical Society of London, <5fc. 
ILLUSTRATED 
WITH COLORED FIGURES OF ALL THE SPECIES, 
DY 
JAMES SOWERBY, F.L.S. G.S. W.S. &c. 
Honorary Member of the Physical Society of Gottingen; Author of English Fungi, British Mineralogy, Exotic 
Mineralogy, Mineral Conchology, a Botanical Drawing-Book, a Neu> Elucidation of Colors ; 
Proprietor of English Botany, Sfc. 
fton&oit ; 
PRINTED BY TY. ARDING, OLD BOSWBLL COURT, CAREY; STREET ; 
PUBLISHED BY JAMES SOWERBY, No. 2, MEAD PLACE, LAMBETH, 
March 1, 1816 
