385 
1906-7.] Meetings of the Society. 
seiche-functions. It is of fundamental importance for the application of 
the seiche-functions, on account of the methods it gives for calculating their 
numerical values ; while the tables it contains will be of the utmost service 
both theoretically and practically. 
Dr Halm is now Chief Assistant at the Cape Observatory, and is in 
consequence unable to be present to receive the prize in person. The 
Council have accordingly asked Professor Dyson to receive the prize for 
Dr Halm. 
The following Communications were read : — 
1. The Pycnogonida of the Scottish National Antarctic Expedition. By T. V. 
Hodgson, E.L.S., Biologist to the National Antarctic Expedition. Communicated 
by Dr R. H. Traquair, E.R.S., etc. 
2. The Marine Mollusca of the Scottish National Antarctic Expedition. By 
James Cosmo Melvill, M.A., F.L.S., and Rob. Standen, Assistant Keeper, 
Manchester Museum. Communicated by Professor J. C. Ewart, F.R.S. 
3. Preliminary Note on the Internal Structure of kigillaria mamillaris, Brongt., 
and Sigillaria scutellata , Brongt. By Robert Kidston, F.R.S. pp. 203-206. 
4. Description of a New Species of Lepidodendron ( L . Petty cur ense), from 
Petty cur. By Robert Kidston, F.R.S. pp. 207-209. 
5. On the Periods of the Elliptic Functions of Weierstrass. By R. T. A. Innes, 
Director, Government Observatory, Transvaal, pp. 357-368. 
6. Hydrachnidse collected by the Lake Survey. By Wm. Williamson, Esq. 
Communicated by Sir John Murray, K.C.B. pp. 302-307. 
7. Degenerations following Experimental Lesions in the Motor Cortex of the 
Monkey. By W. A. Jolly, M.B., and Sutherland Simpson, M.D., D.Sc. (From 
the PhysiologicahLaboratory, University of Edinburgh.) Communicated by Professor 
E. A. Schafer, F.R.S. {With Lantern Illustrations.) pp. 281-301. 
8. Classification of Igneous Rocks according to their Chemical Composition. 
By H. Warth, D.Sc., late Depy. Superintendent, Geological Survey of India. 
Communicated by Professor Geikie, F.R.S. 
9. Note on Quaternion Integrals. By Dr Heinrich Hermann. Communicated 
by Dr C. G. Knott ,pp. 371-372. 
Messrs Alexander Galbraith, Archibald King, M.A., B.Sc., James 
Knight, M.A., D.Sc., F.C.S., F.G.S., F.E.I.S., James Murray, and John 
Thomson Pearce, B.A., B.Sc., were balloted for, and declared duly elected 
Fellows of the Society. 
VOL. XXVII. 
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