XX SEVENTH REPORT—1837. 
It was stated to be desirable that Engineers and Proprietors of Railways 
should be requested (where it is necessary to cover up sections) to preserve 
Notes and Drawings of such sections, and to collect the Organic Fossils, if any, 
and to transmit the same to the Geological Society of London, 
The attention of geological observers was directed to the different varieties 
of superficial Gravel and Detritus; their origin, whether fresh-water or marine ; 
their composition, whether of erratic or of local materials ; their position with 
respect to the present form of the surface and one another; their organic re- 
mains, and other peculiarities. 
NATURAL HISTORY. 
The following reports and monographs were requested in 
addition to such as are mentioned in vol. v. p. xv. 
On the species of Salmonide found in Scotland by Sir W. 
Jardine. 
On the Caprimulgide, by Mr. Gould. 
On the Genera of Fossil Insects belonging to Great Bri- 
tain and Ireland, by the Rev. W. F. Hope. 
For the purpose of collecting materials towards a Fauna of 
Ireland, a Committee was formed, consisting of Capt. Portlock, 
Mr. R. Ball, Mr. W. Thompson, Dr. Coulter, Mr. W. A. 
Eyton, and Mr. Vigors, who was requested to act as Secretary 
to the Committee. 
Mr. J. E. Gray and Mr. R. Ball were requested to investigate 
the mode by which Mollusca, Annelida, and other marine In- 
vertebrata excavate rocks. 
Capt. Ducane, R.N., was requested to continue his researches 
concerning the Crustacea of the waters of Southampton. - 
For the purpose of experiments on the Growth of Plants in 
Glass Vessels, on Mr. Ward’s plan, the further sum of 50/7. was 
placed at the disposal of a Committee, consisting of Mr. James 
Yates, Dr. Daubeny, Prof. Henslow, and Mr. R. Ball. 
For the purpose of experimenting on the best modes of Pre- 
serving Animal and Vegetable Substances the sum of 25/. was 
placed at the disposal of a Committee, consisting of Prof. Hen- 
slow, Mr. Jenyns, Dr. Clark, and Prof. Cumming. 
MEDICAL SCIENCE. 
The following Committees were re-appointed : 
For investigating the Anatomical Relations of the Absorbent 
and Venous Systems in different classes of Animals, with 504. 
at their disposal ; for inquiring into the Effects of Poisons on the 
Animal Economy, with 257. at their disposal ; for the Chemical 
