II. 
III. 
IV. 
AGE 
CONTENTS. 
PART I. (1880-81.) 
. Lhe Law of Extensible Minors in Determinants. By Tuomas 
Murr, M.A., 
On some Transformations connecting General Determinants with 
Continuants. By Tuomas Muir, M.A., 
Report on Fossil Fishes collected by the Geological Survey of Scot- 
land in Eskdale and Liddesdale. Part I1—Ganoidei. By 
Ramsay H. Traquair, M.D., F.R.S., Keeper of the Natural 
History Collections in the Museum of Science and Art, Edin- 
burgh. (Plates I, to VIL, which will be given in the next 
Part), ; : : : ‘ ; ‘ 
On some New Crustaceans from the Lower Carboniferous Rocks of 
Eskdale and Iiddesdale. By B. N. Preacu, A.R.S.M., F.G.S., 
of the Geological Survey of Scotland. Communicated by Pro- 
fessor GEIKIE, F.R.S. (Plates VII. to X.), 
Gaseous ‘Spectra in Vacuum Tubes, under small Dispersion and at 
low Electric Temperature; including an Appendix III., by 
Professor ALEXANDER §. HeErscueLt, M.A., Newcastle-on-Tyne. 
By Professor Piazzi Smytu, Astronomer-Royal for Scotland. 
(Plates XI. and XII.), . 
On a Special Class of Sturmians. By Professor CHRYSTAL, 
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