168 » THE JOURNAL OF BOTANY 
Prof. R. J. Harvey Gibson gave the substance of a paper on 
“The Axillary Seales of Aquatic Monocotyledons.”” He compared 
m seventeen species of Zostera, Potamogeton, Ruppia, Aponogeton, 
Triglochin, Alisma, Sagittaria, Butomus, Limnocharis, Halophila, 
Stratiotes, Hydrocharis, and Vallisneria. Dr. D. Prain read a note 
Mansonia, Its nearest ally is an African genus, Triplochiton, which 
has been made the basis of a new natural order, Triplochitonacea, 
Rosert Tucker, M.A., Camb., Mathematical Master at the 
London University College School from 1865 to 1899, and Hon. 
Secretary of the London Mathematical Society, who was born at 
W 
t, was much 
interested in botany. He did a considerable amount of field work, 
peci in the years 1863 to 1875. He contributed notes, chiefly 
to the Flora of Middlesex. There is an interesting account of him 
in the University College School Magazine for 1899, p. 243. 
first, or ‘“ eral,”’ deal form, composition, structure, 
physiology, and the like; the second, “Special,” con a 
‘*classification of trees and shru i 0 character of 
the leaves.”” As in the previous instalment, the volume owes 
n e 
much of its attractiveness and value to the numerous and ex- 
cellent illustrations; a capital index adds to its usefulness, The 
book is issued Cambridge University Press (4s. 6d. net), 
and is very well printed. 
