PEOCEEDINGS OF 

 THE ROYAL SOCIETY. 



vol. xxxn. No. 212. 



\ 5 



CONTENTS. 



March 24, 1881. 



PAGE 



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

 Echinodermata. By G-eoege J. Eomanes, M.A., F.B.S., and Professor 

 James C. Ewaet, M.D . . . 1 



II. The Functional Relations of the Motor Hoots of the Brachial and Lumbo- 

 sacral Plexuses. By Dayid Feeeier, M.D., F.R.S., Professor of 

 Forensic Medicine, and Geeald F. Yeo, M.D., F.E.C.S., Professor of 

 Physiology in King's College ........ 12 



III. On the Histology and Physiology of the Pepsin-forming Grlands. By 



J. N. Langley, M.A., Fellow of Trinity College, Cambridge . . 20 



March 31, 1881. 



I. On the Coefficients of Expansion of the Di-iodide of Lead, Pbl 2 , and of an 

 Alloy of Iodide of Lead with Iodide of Silver, PbI 3 AgI. By Gr. F. 

 Eodwell, F.R.A.S., F.C.S., Science Master in Marlborough College . 23 



II. Permanent Molecular Torsion of Conducting Wires produced by the 



Passage of an Electric Current. By Professor D. E. Hughes, F.Fv.S. . 25 



III. On the Tendinous Intersection of the Digastric. By Gr. E. Dobsox, M.A., 



M.B 29 



IV. Note on Protagon. By Hexey E. Eoscoe, LL.D., F.E.S. ... 35 



For continuation of Contents see Mh page of Wrapper. 



Price Three Shillings. 



