34 Proceedings of the Royal PJiysical Society. 



. Ill addition to these eleven species of Orthocercts were 

 mentioned, which had, however, been previously described 

 by Fleming.* 



Ten years after tlie publication of the " British Animals," 

 appeared a little work, entitled "The Age of the Earth, 

 considered Geologically and Historically," f by Mr William 

 Ithind, at one time a President of our Society. In this are 

 figured three bivalve shells from the " coal strata " at Wood- 

 hall, Water of Leith, and from the coal shale at PolmoDt, 

 Falkirk. These shells are : 



Axinus PentlanclicKs (Ehind), Woodhall. 

 Modiola, 1 species, „ 



Unio, 3 „ Polmont. 



Mr Ehind was a member of the Pvoyal College of Surgeons 

 of Edinburgh, and the author of two other works on Geology. 



An attempt to bring together in one volume the whole fossil 

 conchology of any given country, both descriptive and illus- 

 trative, cannot but commend itself to our warmest sympathies. 

 A task so gigantic would, at the present time, be nigh im- 

 possible, but in 1849, when Sowerby's '' Mineral Conchology" 

 had been discontinued for three years, it was accomplished 

 by Captain T. Brown. His " Illustrations of the Fossil Con- 

 chology of Great Britain and Ireland"! will always remain 

 a monument of his industry, ability, and scientific acumen. 

 In this book are given a brief description and figure of all 

 the fossil shells known to the author at that time. One 

 omission detracts greatly from the value of the "Illustra- 

 tions," viz., the absence of all reference to Professor M'Coy's 

 valuable work, " Synopsis of the Carboniferous Limestone 

 Fossils of Ireland," published in 1844. 



Thomas Brown, Captain in the Forfar Eegiment, was Presi- 

 dent of this Society about 1831 and 1832, a member of the old 

 Wernerian Society, and at one time, during a residence in 

 Mancliester, curator of the Museum of the Literary and 

 ] Philosophical Society of that town. 



* Thomson's Ann. Phil., 1815, v., p. 199. 

 + Pp. 202, 12mo, Edinburgh, 1838. 

 X Pp. 273, pis. 08, -Ito, London, 1849. 



