Dr Spruce's important work, " Hepatic^ of the Amazon 

 and of the Andes of Peru and Ecuador," consisting of 600 pp. 

 letterpress and 22 plates, forms Vol. XV., and may be pur- 

 chased separately. Price 21s. The work is in Latm, with a 

 few notes in English. 



Dr Aitchison's "Notes on the Products of Western Afghan- 

 istan and of North-Eastern Persia," forming the first part of 

 the present volume, may be purchased separately. Price 

 10s. 6d. 



