33i 
The British Association at Sheffield. 
the poles without the formation of chromosomes. Mr. Harold 
Wager discussed “Chromosome Reduction in the Hymenomycetes.” 
In this group reduction is effected by the distribution of the chro¬ 
mosomes in a manner which apparently corresponds to the brachy- 
meiotic phase in the ascus as described by Miss Fraser. Mr. F. T. 
Brooks gave the results of some preliminary observations and 
experiments on the “ Silver-leaf disease of fruit trees.” 
Friday morning was occupied in part by the joint meeting with 
Section D already referred to, and in part by other papers dealing 
with cytology and also with heredity. Miss Fraser and Mr. J. Snell 
contributed a paper on “ Vegetative Mitosis in the Bean,” and 
Professor J. B. Farmer and Miss Digby one “On the Somatic and 
Heterotypic Mitoses in Galtonin.” In these two papers the respective 
authors agreed in stating that the longitudinal fission which occurs 
during mitosis is initiated during the telophase of the preceding 
division. Professor V. H. Blackman produced circumstantial 
evidence that “ the vermiform male nuclei of Lilium ,” though 
devoid of cilia, are in reality capable of movement. 
Professor F. E. Weiss, in an account of “ Colour-inheritance 
in Anagallis arvensis,” showed that in this case red is dominant and 
blue recessive. Mr. R. P. Gregory gave some “ Further Observations 
on Inheritance in Primula sinensis.” 
Professor F. O. Bower gave the semi-popular lecture on Friday 
afternoon, his subject being “ Sand-dunes and Golf-links.” 
Monday afternoon was devoted to anatomical and other papers. 
Professor Bower began with a brief “Note on Ophioglossum 
palmatum,” bringing forward anatomical evidence that this species t 
like O. pendulum and 0. simplex, is an extreme and specialised type. 
The same author also contributed a paper “ On two Synthetic 
Genera of Filicales.” The two genera in question are Plagiogyria 
and Lophosoria, both of which the author regards as having arisen 
from types related to the Schizaeaceae and Gleicheniaceae. From 
this starting-point Professor Bower traced two parallel sequences 
of living forms, passing respectively through these genera, and 
leading in one case to the Pterideae, and in the other to the 
Cyatheaceae. Dr. Kidston and Professor Gwynne-Vaughan in a 
paper “ On the Fossil Genus Tempskya,” suggested that the extra¬ 
ordinary “ false stems ” of this fossil may throw light on the evolution 
of the erect arboreal stems of modern tree-ferns. Miss M. C. Stopes 
gave some “ Further Observations on the Fossil Flower,” dealing 
