CONTENTS. 
PART III. 
XII. Researches in Spectrum-Analysis in connexion with the Spectrum of the Sun .— 
No. V. By J. Norman Lockyer, F.R.S . page 561 
XIII. Researches on the Minute Structure of the Thyroid Gland. By E. Cresswell 
Baber, M.B., Loud. Communicated by E. Klein, M.D., F.R.S. . . . 577 
XIV. On Toroidal Functions. By W. M. Hicks, M.A., Fellow of St. Johns College, 
Cambridge. Communicated by J. W. L. Glaisher, M.A., F.R.S. . . 609 
XY. Polacantlms Foxii, a large undescribed Dinosaur from the Wealden Formation in 
the Isle of Wight. By J. W. Hulke, F.R.S . 653 
XYI. On the Histology and Physiology of Pepsin forming Glands. By J. N. Langley, 
M.A., Fellow of Trinity College, Cambridge. Communicated by Dr. M. 
Foster, F.R.S. . 663 
XYII. Memoir on Abel’s Theorem. By II. C. Rowe, M.A., Fellow of Trinity College, 
Cambridge. Communicated by A. Cayley, LL.D., F.R.S., Sadlerian Professor 
of Mathematics in the University of Cambridge . 713 
Addition to Mr. Rowe’s Memoir. By Professor Cayley, F.R.S . 751 
XYIII. On Riccati’s Equation and its Transformations, and on some Definite Integrals 
which satisfy them. By J. AY. L. Glaisher, M.A., F.R.S. Fellow of Trinity 
College, Cambridge . 759 
XIX. The Croonian Lecture. — Observations on the Locomotor System of Echinoder- 
rnata. By George J. Romanes, M.A ., F.R.S., and Professor J. Cossar 
Ewart, M.D . 829 
XX. On the Influence of the Molecular Grouping in Organic Bodies on their 
Absorption in the Infra-red Region of the Spectrum. By Captain Abney, 
R.E., F.R.S., end Lieut.-Colonel Festing, R.E. . 887 
Index to Volume 
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