PHILOSOPHICAL TRANSACTIONS. 



Contents of Paet III, 1881. 



XII. Researches in Spectrum Analysis in connexion with the Spectrum of the 

 Sun. — No. V. By J. Norman Lockyer, F.R.S. 



XIII. Researches on the Minute Structure of the Thyroid Gland. By S. Cress- 



welb Baber, M.B., Lond. 



XI V. On Toroidal Functions. By W. M. Hicks, M.A., Fallow of St. John's 



College, Cambridge. 



XY. Polacanthus Foxii, a large undescribed Dinosaur from the vVealden Forma- 

 tion in the Isle of Wight. By J. W. Helke, F.R.S. 



XYI. On the Histology and Physiology of Pepsin-forming Grlands. By J. X. 

 Langley, M.A., Fellow of Trinity College, Cambridge. 



XVII. Memoir on Abel's Theorem. By R. C. Rowe, M.A., Fellow of Trinity 

 College, Cambridge. 



Addition to Mr. Rowe's Memoir. By Professor Cayley, F.R.S. 



XVIII. On Riccati's Equation and its Transformations, and on some Definite 

 Integrals which satisfy them. By J. W. L. GtLaisher, M.A., F.R.S.,. 

 Fellow of Trinity College, Cambridge. 



XIX. The Ceoonian Lecture. — Observations on the Locomotor System of 

 Kchinodermata. By G-eorge J. Romanes, M.A., F.R.S., and Professor 



J. COSSAR EWAET, M.D. 



XX. On the Influence of the Molecular Grrouping in Organic Bodies on their 

 Absorption in the Infra-red Region of the Spectrum. By Captain 

 Abnet, R.E., F.R.S., and Lieut.-Colonel Festing, R.E. 



Index to Volume. 



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