VI CONTENTS. 



PAG K 



X. On the Structure of Suberites domuncula, Olivi (0. S.), together 

 with a Note on peculiar Capsules found on the Surface of 

 Spongelia. By J. Arthur Thomson, F.R.S.E. (Plates XVI., 

 XVIL), .241 



XI. The Reproductive Organs of Bdellostoma, and a Teleostean Ovum 

 from West Coast of Africa. By J. T. Cunningham, B.A., 

 F.R.S.K, ....... 247 



PART II. (1886-87.) 



XII. On the Foundations of the Kinetic Theory of Gases. II. By 



Professor Tait, Sec. R.S.E., . . . . .251 



XIII. Tables for facilitating the Computation of Differential Refraction 

 in Position, A ngle, and Distance. By the Hon. Lord M'Laren 

 F.R.S.E., . 



XIV. On a. Class of Alternating Functions. By Thomas Muir, LL.D 

 F.R.S.E., 



XV. Expansion of Functions in terms of Linear, Cylindric, Spherical 

 and Allied Functions. By P. Alexander, M.A. Communi 

 cated by Dr T. Mum, F.R.S.E., 



XVI. On Cases of Instability in Open Structures. By E. Sang, LL.D. 

 F.R.S.E., . 



279 



309 



31:3 



321 



XVIL On the Fossil Flora of the Radstock Series of the Somerset and 

 Bristol Coal Field {Upper Coal Measures). Parts I., II. 

 By Robert Kidston, F.R.S.E., F.G.S. (Plates XVIII. - 

 XXVIIL), 335 



XVIII. A Diatomaceous Deposit from North Tolsta, Lewis. By John 

 Rattray, M.A., B.Sc., F.R.S.E., of H.M. "Challenger" 

 Commission, Edinburgh. (Plate XXIX.), . 419 



XIX. On the Minute Structure of the Eye in certain Cymothoida. By 

 Frank E. Beddard, M.A., F.R.S.E., F.Z.S., Prosector to 

 the Zoological Society, and Lecturer on Biology at Guy's 

 Hospital. (Plate XXX.), . . . . .443 



