ON EXPERIMENTAL STUDIES IN THE PHYSIOLOGY Of HEREDITY. 227 
styled, short-styled, and equal-styled, has been worked out, and some 
facts of importance have been ascertained. 
The experiments of the present year have much elucidated the 
peculiar phenomena seen in the case of the ‘walnut’ combs of fowls, and 
we anticipate that this part of the work will shortly be finished. Progress 
has also been made with the subject of colour-inheritance in fowls, and 
some new lines of experiment have been started. 
The colour phenomena following reversion in sweet peas, hitherto 
very complex, have been a good deal simplified by this year’s results. It 
is likely that another season’s work will make it possible to provide a 
fairly complete scheme of inheritance in this case. 
In May, 1905, a Report to the Evolution Committee of the Royal 
Society was published, dealing with the work up to the end of 1903 in 
detail, and giving incidentally conclusions derived from the work of 
1904. A Report up to the end of the 1905 season will be prepared next 
winter. 
Several fresh inquiries have been begun. Of these the chief relate to 
the inheritance of sex in Lychnis, and of the direction of the spirals, 
right or left, in the fruits of Medicago. 
The Structure of Fossil Plants.—Interim Report of the Committee, con- 
sisting of Dr. D. H. Scorr (Chairman), Professor F. W. OLIVER 
(Secretary), and Messrs. A. C. SEwarp and EK, NEWELL ARBER. 
AL the money expended (33/. 18s. 3d.) has been devoted to the purchase 
of sections of Coal-measure plants, largely from the new locality at Shore- 
Littleborough, Lancs, recently opened up to scientific investigation by 
Mr. Sutcliffe. 
The specimens obtained fall under three heads :— 
For Mr. Arber, about fifty sections of a new ribbed Sigillaria. 
For Professor F. W. Oliver, fifty-nine sections of Pteridospermous 
seeds, mainly Lagenostoma physoides. 
For Professor I’, E. Weiss, forty-one sections of Stigmaria, including 
a new species. 
_ The sections are now in the hands of these three gentlemen for 
purposes of investigation. 
We hope to embody some account of the scientific results attained in 
our final report. 
The work will be carried on during the coming year, and the Com- 
mittee desire to be reappointed, and also to apply for leave to retain the 
balance of 16/. 1s. 9d. now in the hands of the Chairman. 
They further wish to apply for an additional grant of 20/. for the 
pursuit of the investigation, and recommend that Professor F. E. Weiss 
be added to the Committee. 
Q2 
