No. XII. 
(Price Seven Shillings and Sixpence colored,, and Six Shillings plain) 
MALACOSTRACA PODOPHTHALMA 
BRITANNIA; 
OR 
DESCRIPTIONS OF THE BRITISH SPECIES OF 
Crafts, Hoftstferss, Ikatons, 
AND OF OTHER 
MALACOSTRACA WITH PEDUNCULATED EYES, 
BY 
WILLIAM ELFORD LEACH, M. D. F. L. S. & W. S. 
frtlcw of the Royal College of Physicians of Edinburgh, and of the Royal College of Surgeons, and of the Medico- 
chirurgical Society of London, Sfc. 
ILLUSTRATED 
WITH COLORED FIGURES OF ALL THE SPECIES, 
BY 
JAMES SOWERBY, F.L.S. G.S. W.S. & c . 
Honorary Member of the Physical Society of Gottingen ; Author of English Fungi, British Mineralogy, Eton, 
Mineralogy, Mineral Conchology, a Botanical Bromng.Book, a New Elucidation of Colors , 
Proprietor of Engirt Botany, Ifc. 
Eonfton : 
PRINTED BY W. ARDING, OLD BOSWELL COURT, CAREY STREET; 
PUBLISHED BY JAMES SOWERBY, No. 2, MEAD PLACE, LAMBETM. 
