1Y 
Monday , 1 6th May 1881. 
Note on a Phoronis dredged in H.M.S. “Challenger.” By 
W. C. McIntosh, ..... 
Additional Researches on the Structure of the Palceoniscidce 
and Platysomidce. By Dr R. H. Traquair, 
Note on the Heating produced by Compression. By Pro- 
• fessor Tait, ...... 
„ Monday , §th June 1881. 
On the Structure of the Skeleton of Tubipora musica, and on 
the Relation of the Genus Tubi'pora to Syringopora. 
By Professor H. Alleyne Nicholson, M.D., D.Sc., . 
On an Iodine Battery. By Mr A. P. Laurie. Com- 
municated by Professor Tait, . . . 
Note on Chemical Affinity and Atomicity. By William 
Durham, ...... 
On the Physical and Biological Conditions of the Channel 
between Scotland and the Faro Islands. By Sir C. 
Wyville Thomson, ..... 
Monday, 20tli June 1881. - , , , 
On a Class of Sturmian Functions. By Professor. C hrystal, 
Preliminary Report on the Tunicata of the “ Cha^enger ’’ 
Expedition. Part IV. By W. A. Herdman ..Sc., . 
On Comenic Acid. By D. B. Dott. Communicated by 
Professor Crum Brown, .... 
On Morgan’s Systems of Consanguinity and Affinity. By 
Dr Macfarlane, ..... 
Note on a Proposition in the Theory of Numbers. By 
Professor Tait, ..... 
Monday , 4 th July 1881. 
An Address on the Island of Socotra. By Professor I. 
Bayley Balfour, .... 
On some new species of Fossil Scorpions from the Car- 
boniferous Rocks of Scotland and the English Borders, 
with a Review of the genera Eoscorpius and Mazonia 
of Messrs Meek and Worthen. By B. N. Peach, 
Monday , 18^ Jidy 1881. 
Report of the Boulder Committee, with Remarks by the Con- 
vener, Mr D. Milne Home. (Plates I., II., III.), 
On the Compression of Gases by High Pressures, By Pro- 
fessor Tait, ...... 
Petermination of Longitude without a Chronometer. By 
Dr Menzies. Communicated by Professor Tait, 
Electric Discharge through Colza Oil. By A. Macfarlane, 
M.A., D.Sc., F.R.S.E., . 
On Quaternion Integration. By Professor Tait, 
Chairman’s Concluding Remarks at the close of the Session, 
On the Classification of Statistics and its Results. By 
Patrick Geddes, F.R.S.E., 
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