452 SECTIONAL TRANSACTIONS.—K. 
reference : ‘To consider the probable effects from an economic and physical 
point of view of the destruction of tropical forests in India.’ In collaboration 
with Dr. Cleghorn the lines of a forestry administration were laid down and 
the nucleus of a Forest Department was established as a definite branch of the 
State service. The result of the efficient management thus introduced has 
been : (1) Plentiful supply of forest products with the protective co-operation | 
of the people; (2) a considerable annual revenue. 
5. Prof. D. and Mrs. THopay.—Lantern Demonstration of some 
Aspects of South African Bush, especially in relation to 
Moisture Conditions. 
6, Dr. Kinston, F.R.S., and Prof. W. H. Lane, F.R.§.—Ezhibition 
of Rhynie Material (in the Botanical Laboratory of the Royal 
Botanic Gardens). 
In the evening a visit took place to Arthur’s Seat and Duddingston. 
Friday, September 9. 
7. Presidential Address by Dr. D. H. Scort, F.R.S., on The 
Present Position of the Theory of Descent in Relation to the 
Early History of Plants. See p. 170. 
Followed by joint discussion with Section C, with special reference 
to the Rhynie fossil plants. (See p. 419.) 
In the afternoon an excursion to Gullane took place. 
Saturday, September 10. 
An excursion to Nurthley and Dunkeld took place. 
Monday, September 12. 
8. Mr. Matrnews.—The Distribution of Certain Elements of the 
British Flora. 
9, Prof. McLean THompson.—The Bearing of the Floral Morphology 
of the Cannon Ball Tree (Couropita) on the Floral Morphology 
of the Myrtales. 
The development of the remarkable lopsidedness of the flower was shown to 
be correlated with cellular gigantism. Comparison was made with the 
Lecythidacez. 
10, Mr. H. H. THomas.—On a New Group of Angiospermous Fruits 
from the Middle Jurassic of Yorkshire. 
The specimens fall into two genera, Caytonia and Gristhorpia, of which most 
study has been given to Caytonia. They consist of small bunches of stalked 
fruits which are inverted and show traces of what may be a stigma. Special 
microtome methods have been applied to the material. Each fruit contains 
about eight small seeds, covered with a double fibrous integument. They seem to 
constitute a group of Angiosperms of which there are no living representatives, 
and they may perhaps be regarded as forming a link between Pteridosperms 
and flowering plants. 
11. Miss L. Barren.—Organs of Attachment in Polysiphonia. 
The form of the attachment organ varies with the species and is influenced 
by the nature of the substratum. Four types may be distinguished :— 
1. Rhizoids formed from longitudinal proliferation of siphons. 
2. Elementary aggregations to form a disc. 
3. Largely formed of stunted lateral branches. 
4. Corticate forms which show a pseudo-tissue in disc. 
oe 
ee a ie a i 
