16 Mr. J. W. Hulke. On Polacanthus Foxii. [Jan. 13, 



Mueller (Baron von), F.R.S. Description and Illustrations of the 

 Myoporinous Plants of Australia. Lithograms. 4to. Melbourne 

 1886. The Author. 



Rambaut (A. A.) On the Possibility of determining the Distance of a 

 Double Star. 8vo. Dublin 1886 ; On the Reduction of Bessel's 

 Precessions to those of Struve. 8vo. London 1886. 



The Author. 



Rayleigh (Lord), Sec. U.S. Electrical Measurements. 4to. [London'] 

 1886. The Author. 



Reade (T. Mellard) The Origin of Mountain Ranges. 8vo. London 

 1886. The Author. 



Sang (E.) A new general Theory of the Teeth of "Wheels. 8vo. 

 Edinburgh 1852. The Author. 



Selwyn (Alfred), F.R.S. Descriptive Catalogue, Economic Minerals 

 of Canada, Colonial and Indian Exhibition, 1886. 8vo. London 

 1886. The Author. 



Spencer (J. W.) Niagara Fossils. 8vo. St. Louis 1884. 



The Author. 



January 13, 1887. 

 Professor STOKES, D.C.L., President, in the Chair. 



The Presents received were laid on the table, and thanks ordered 

 ior them. 



The Right Hon. Hardinge Stanley Giffard, Lord Halsbury (Lord 

 High Chancellor), whose certificate had been suspended as required 

 by the Statutes, was balloted for and elected a Fellow of the Society. 



The following Papers were read : — 



I. " Supplementary Note* on Polacanthus Foxii, describing the 

 Dorsal and some parts of the Endoskeleton imperfectly 

 known in 1881." By J. W. Hulke, F.R.S. Received 

 December 14, 1886. , 



(Abstract.) 



The author describes the large dorsal shield, which has been 

 recently restored and now exhibits the grouping of the keeled and 

 tuberculated fragments, which in their disconnected and scattered 



* See 'Phil. Trans.,' vol. 172 (1881). 



