xii INTRODUCTION. 
by the late Mr. E. Wood, F.G.S., of Richmond, and by 
Mr. William Horne, 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 
Museunt of the Natural History Society, Barras Bridge, Newcastle- 
upon-Tyne, 1889. 
