Contents. 
VlL 
PAGE 
On Degenerated Specimens of Tulipa sylvestris. By Mrs A. B. 
Griffiths. Communicated by Dr A. B. Griffiths, F.R.S.E., &c., . 349 
The Luminous Organs of Nyctiphanes ‘ norvegica , Sars. By J. T. 
Cunningham, B.A., and Rupert Yallentin, Esq., . . . 351 
On a Constant Daniell Cell, for use as a Standard of Electromotive 
Force. By Cosmo I. Burton, B.Sc., F.C.S., . . . 356 
On Glories. By Professor Tait, ..... 358 
Report on the Pennatulida dredged by H.M.S. u Porcupine.” By 
A. Millies Marshall, M.D., D.Sc., M.A., F.R.S., Beyer Professor 
of Zoology in the Owens College, and by G. H. Fowler, B.A., 
Ph.D., Berkeley Fellow of the Owens College, Manchester. Com- 
municated by John Murray, Esq., Ph.D., .... 359 
Stability of Fluid Motion. — Rectilineal Motion of Viscous Fluid be- 
tween two Parallel Planes. By Sir W. Thomson, LL.D., 
F.R.S., . . . . . . . .359 
Note on the Epiblastic Origin of the Segmental Duct in Teleostean 
Fishes and in Birds. By George Brook, Esq., F.L.S., Lecturer on 
Comparative Embryology in the University of Edinburgh. Com- 
municated by Professor Sir Wm. Turner, F.R.S., . . . 368 
Preliminary Note on the Chemistry of Strophantliin. By Thomas 
R. Fraser, M.D., F.R.S., Professor of Materia Medica in the Uni- 
versity of Edinburgh, ...... 370 
On a New Diffusiometer and other Apparatus for Liquid Diffusion. 
By J. J. Coleman, Esq., F.I.C., F.C.S., .... 374 
On the Minute Structure of the Eye in certain Cymothoidse. By 
Frank E. Beddard, Esq., M.A., F.Z.S., . . . .381 
On the Mean Height of the Land of the Globe. By John Murray, 
Esq., Ph.D., ........ 381 
The Ghcetopoda Sedentaria of the Firth of Forth. By J. T. Cunning- 
ham, Esq., B.A., ....... 381 
Laws of Solution. Part II. By W. Durham, Esq., . . . 381 
On the Partition of Energy between the Translatory and Rotational 
Motions of a set of non-homogeneous Elastic Spheres. By Professor 
W. Burnside. Communicated by Professor Tait, . . . 387 
On the Salinity, Temperature, &c., of the Firth of Forth. By H. R. 
Mill, Esq., D.Sc., ....... 387 
The Direct Measurement of the Peltier Effect. By Albert Camp- 
bell, Esq. Communicated by Professor Tait. (Plate XIII.), . 387 
On some Vapour Densities at High Temperatures. By Alexander 
Scott, Esq., M.A., D.Sc., ...... 410 
On the Determination of the Plane Curve which forms the Outer 
Limit of the Positions of a certain Point. By Dr C. Plarr. Com- 
municated by Professor Tait, . . . . .415 
The Thermal Windrose at the Ben Nevis Observatory. By A. 
Rankine, Esq., ....... 416 
