(SUCCESSORS TO MR. VAN VOORST.} 



On the Variation of Species, with especial reference to the Insecta : followed 

 by an inquiry into the nature of Genera. By T. VEKNON WOLLASTON, M.A., 

 F.L.S. Post 8vo, 55. 



On Parthenogenesis ; or, the Successive Production of Procreating Individuals 

 from a Single Ovum. A Discourse delivered at the Eoyal College of Surgeons of 

 England. By EICHARD OWEN, F.E.S. &c. 8vo, fs. 



On a True Parthenogenesis in Moths and Bees : a Contribution to the 

 History of Eeproduction in Animals. By CARL T. E. VON SIEBOLD. Translated 

 by W. S. DALLAS, F.L.S. &c. 8vo, cloth, 55. 



The Entomologists' Annual, 1855 to 1874. Edited by H. T. STAINTON, 

 F.E.S. Comprising Notices of the New British Insects detected in each year, with 

 other original papers. Fcp. 8vo, boards, 2S. 6d. each. 



The Entomologists' Monthly Magazine : conducted by K. MCLACHLAN, 

 F.E.S., H. T. STAINTON, F.E.S., and others. On the first of every month, price 6d. 

 The 24th volume completed-in May 1888. 8vo, cloth, js. 



BOTANY. 



British Wild Flowers. Illustrated by JOHN E. SOWERBY. Described with 

 an Introduction and a Key to the Natural Orders, by 0. PIERPOINT JOHNSON. 

 Ee-issue, to which is now added a SUPPLEMENT containing 180 new figures, 

 comprising lately discovered Flowering Plants, by JOHN W. SALTER, A.L.S., 

 F.G.S. ; and the Ferns, Horse-tails, and Club-Mosses, by JOHN E. SOWERBY. 

 Large 8vo, with 1780 Coloured Figures, 3 35. 



An Elementary Course of Botany : Structural, Physiological, and Syste- 

 matic. By Professor ARTHUR HENFREY, F.E.S., F.L.S., &c. Illustrated by 

 upwards of 600 Woodcuts. Fourth Edition, by MAXWELL T. MASTERS, M.D., 

 F.E.S., F.L.S., &c., Examiner in Botany to the University of London. The 

 Section relating to Cryptogamia re-written by A. W. BENNETT, M.A., B.Sc., &c. 

 Post 8vo, 155. 



Manual of British Botany, containing the Flowering Plants and Ferns, 

 arranged according to the Natural Orders. By Professor CHARLES CARDALB 

 BABINGTON, M.A., F.E.S., &c. Eighth Edition, corrected throughout, izmo, 

 cloth, i os. 6d. ; thin-paper copies, in limp leather binding (for the pocket), 125. 



An Illustrated Key to the Natural Orders of British Wild Flowers. 



By JOHN E. SOWERBY. With 9 Plates, containing 112 Coloured Figures. 8vo, 

 js. 6d. 



British Poisonous Plants. Illustrated by JOHN E. SOWEHBY. Described by 

 CHARLES JOHNSON, Botanical Lecturer at Guy's Hospital, and C. PIERPOINT JOHN- 

 SON. Second Edition, containing the principal Poisonous Fungi. Post 8vo, with 

 32 Coloured Plates, ys. 6d. 



Rudiments of Botany. A Familiar Introduction to the Study of Plants. 

 By Professor HENFREY. With Illustrative Woodcuts. Second Edition, fcp. 8vo, 

 3 s. 6d. 



A Set of Six Coloured Diagrams : for Schools and Lectures. By Professor 

 HENFREY. 1 55. 



Vegetation of Europe, its Conditions and Causes. By Professor HENFREY. 

 Fcp. 8vo, 55. 



Weeds and Wild Flowers. By Lady WILKINSON. Post 8 vo, with Coloured 

 Engravings and Woodcuts, los. 6d. 



1 PATERNOSTER ROW. 



