BY THE SAME AUTHOR. 



FUNGI : THEIR NATURE, INFLUENCES, USES, &C. 



Edited by the Rev. M. J. Berkeley. With Illustrations. 

 Fourth Edition. Crown 8vo, 5s. 



INTRODUCTION TO FRESH WATER ALGJE, with an 

 Enumeration of all the British Species. With Thirteen 

 Plates. Crown 8vo, 5s. 



LONDON : 

 KEGAN PAUL, TRENCH, TRUBNER & CO., Ltd. 



