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| NOTES AND COMMENTS. 
i ; ' “THE MICROLOGIST.’ 
The Micrologist, Vol. III., Part 3, for April (Flatters, 
Milborne & McKechnie, Ltd., Manchester, Is. 6d.) is to hand. 
There is an excellent plate as frontispiece showing details of 
an entire longitudinal median section of a mouse ; Mr. Abraham 
Flatters has a well illustrated article on ‘ The Sunflower ; its 

Transverse section through four dise flowers of the Sunflower. 
A.—Tubular petals. B.—Style, with a pair of vascular 
bundles shown as black dots. C.—The five anthers containing 
pollen. D.—Interfloral spaces. 
development and structure.’ and there are hints on manipula- 
tion, and ‘notes from workers.’ We are kindly permitted to 
reproduce one of the illustrations herewith. 
PROFESSOR BONNEY ON ‘ CERTAIN CHANNELS.’ 
It will be remembered that in his Presidential Address to 
the British Association at Sheffield in 1910, Professor T. G. 
Bonney dealt with ‘ Ice Work in Western Europe,’ which was 
noticed at some length in The Naturalist at the time. »In 
connection with that address we are now informed that he 
examined a part of Yorkshire in which Professor Kendall had 
asserted the existence of overflow channels from lakes pro- 
duced by the obstruction of ice-sheets. In 1912 Prof. Bonney 
1916 May 1. 
K 
