PHILOSOPHICAL TRANSACTIONS. 



Contents op Paet III, 1881. 



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

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



XIII. Researches on the Minute Structure of the Thyroid Grland. By E. Cress- 

 well Baber, M.B., Lond. 



XIY. On Toroidal Fiinctions. By W. M. Hicks, M.A., Fellow of St. John's 

 College, Cambridge. 



XV. Pol acanthus Foxii, a large undescribed Dinosaur from the Wealden Forma- 

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



XVI. On the Histology and Physiology of Pepsin-forming Gflands. By J. N. 

 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 Catley, F.R.S. 



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

 Integrals which satisfy them. By J. W. L. G-laisher, M.A., F.R.S., 

 Fellow of Trinity College, Cambridge. 



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

 Echinodermata. By George J. Romanes, M.A., F.R.S., and Professor 



J. COSSAR EWART, M.D. 



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., and Lieut.-Colonel Festing, R.E. 



Index to Volume. 



Price £2 2s. 



Part I, 1882, will be published shortly.' 



Extra volume (vol. 168) containing the Reports of the Naturalists attached to the 

 Transit of Venus Expeditions. Price £3. 



Sold by Harrison and Sons. 



Separate copies of Papers in the Philosophical Transactions, commencing with 1875, 

 may be had of Triibner and Co., 57, Ludgate Hill. 



