xii INTR OD UCTION. 



by the late Mr. E. Wood, F.G.S., of Richmond, and by 

 Mr. William Home, F.G.S., of Leyburn, whose collections 

 are now in the York Museum ; and a series of teeth entirely 

 detached from matrix has been obtained from South 

 Derbyshire by Mr. Edward Wilson, F.G.S., this being 

 now in the British Museum. The limestone of Oreton, 

 Shropshire, was explored by the late Messrs. T. Baugh, 

 of Bewdley, and Weaver Jones, of Cleobury Mortimer, 

 whose collections are also in the British Museum ; and 

 the Bristol limestone is especially well represented in the 

 Museum of that city, where many of the types described 

 by Agassiz are preserved. In the Carboniferous Lime- 

 stone of North Wales, Mr. G. H. Morton, F.G.S., has 

 discovered several Selachian teeth ; and in the North of 

 Ireland, the late Admiral Jones and the Earl of Ennis- 

 killen made the unique collection of Selachian teeth and 

 spines now in the British Museum and the Museum of 

 the Geological Society of London. 



The Permian fishes of Durham seem to have been 

 first collected by Mr. Henry Witham, of Lartington,, 

 whose fossils form the subject of the plates accom- 

 panying Sedgwick's classic memoir on the Magnesian 

 Limestone. A large series is preserved in the Newcastle- 

 upon-Tyne Museum, as also in the private collection of 

 Mr. William Dinning, of Newcastle ; and there is a good 

 typical series in the British Museum. The Newcastle 

 Museum is largely indebted to the labours of Mr. R. 

 Howse* and Mr. James W. Kirkby, the former of whom, 

 in conjunction with the late Mr. Albany Hancock, was- 

 the first to make known the discovery of Reptilia and 

 Amphibia in the English Permian. 



British Triassic Vertebrata are very rare, and chiefly 

 represented in the Museums of Warwick, Shrewsbury, 



* R. Howse, Guide to the Collections of Local Fossils in the 

 Museum of the Natural History Society, Barras Bridge, Newcastle- 

 upon-Tyne t 1S89. 



