CONTENTS. 
PAGE 
Office-Bearers, Session 1907-8, ........ 1 
An Experimental Investigation of the Temperature Changes occurring in Fresh- 
Water Lochs. By E. M. Wedderburn, M.A., LL.B. Issued separately 
December 24, 1907, ......... 2 
Notes on some Oligochsets found on the Scottish Loch Survey. By C. H. Martin, 
B.A. (Magdalen College, Oxford). Communicated by Sir John Murray, K.C.B. 
(With Plates I., II.) Issued separately December 24, 1907, . . .21 
Notes on some Turbellaria from Scottish Lochs. By C. H. Martin, B.A. (Magdalen 
College, Oxford). Communicated by Sir John Murray, K.C.B. (With Plates 
III., IV.) Issued separately December 24, 1907, .... .28 
An Account of a Brachydactylous Family. By H. Drinkwater, M.D. (Edin.), 
M.R.C.S. (Lond.), etc. Communicated by Professor D. J. Cunningham, 
F.R.S. Issued separately January 10, 1908, ..... 35 
Notolepis Coatsi, Poisson pelagique nouveau recueilli par l’Expedition Antarctique 
Nationale Ecossaise. Note preliminaire, par Louis Dollo, Sc.D. (Cantab.), 
For.Mem.G.S., C.M.Z.S., a Bruxelles (Musee). Presentee par M. R. H. Traquair, 
M.D., F.R.S., V.P.R.S.E. Issued separately January 10, 1908, . . .58 
The Body-Temperature of Fishes and other Marine Animals. By Sutherland 
Simpson, M.D., D.Sc. Communicated by Professor E. A. Schafer, F.R.S. Issued 
separately January 29, 1908, ....... 66 
Classification of Igneous Rocks according to their Chemical Composition. By 
H. Warth, D.Sc., Tubingen, late Dep.-Superintendent, Geological Survey of 
India. Communicated by Professor James Geikie, F.R.S. Issued separately 
February 1, 1908, ......... 85 
A Note on the Roman Numerals. By James A. S. Barrett, M.A. Communicated by 
J. Sutherland Black, M.A., LL.D. Issued separately February 1, 1908,. . 161 
Dr Edward Sang’s Logarithmic, Trigonometrical, and Astronomical Tables. Issued 
separately February 1, 1908, . . . . . . .183 
The Theory of Compound Determinants in the Historical Order of its Develojnnent 
up to 1860. By Thomas Muir, LL.D. Issued separately April 8, 1908, . 197 
The Product of the Primary Minors of an n-by-(n+l) Array. By Thomas Muir, 
LL.D. Issued separately April 8, 1908, ...... 210 
Seismic Radiations. By Professor C. G. Knott, D.Sc. Issued separately April 9, 
1908, 
217 
