4 BOTANICAL PUBLICATIONS OP THE RAY SOCIBTy. 



The Principles oE Plant-Teratology. By W. 0. Woesdell. 

 8vo. Vol. Ij containing Non- Vascular Plants, and tlie Root, 

 Stem, and Leaves of Vascular Plants, xxiv + 270 + 50 pp., 

 25 plates. 1915. Vol. II, containing the Flower, and con- 

 cluding the work, xvi + 296 -|- 56 pp., 28 plates. 1916. 



In Course of Publication. 



A. Monograph of the British Desmidiacese. After Vol. IV 

 b.y Prof. Gr.S. West. 



'Preparing for Publication. 



The British Characese. By James Groves. For 1917. 

 , The British DiatomacsEe. By Gteorge West. 



Prices, and a coinplete list of the Society's publications, will be for- 

 warded on ■ application to the Secretary, John HopTcinson, Weetwood, 

 Watford. 



November, 1916. 



