'^'2 POSTSCRIPT 



Postscript 



The death of Mr. Thomas Newbitt, F.G.S., which occurred suddenly 

 on June 15, 1912, casts a shadow over this work. As Honorary Curator 

 of Whitby Museum, in succession to Martin Simpson, he took a very 

 particular interest in this pubHcation. In the five years since the plans 

 for It were first formed, Mr. Newbitt laboured long and carefully in regard 

 to the specimens required— so much that the majority of the types of 

 Simpson and of Young & Bird have been in the Editor's hands. Still, 

 much remained to be done, and Mr. Newbitt's labours, though necessarily 

 unobtrusive, were none the less invaluable : his kind assistance will be 

 very greatly missed. Sympathy with his widow and his two nieces is 

 joined with this appreciation of his services. 



Eight parts of this publication are completed with the present issue, 

 illustrating with 80 plates 67 species, of which the majority, it may be 

 claimed, were known to science only by name, and hardly by that. These 

 eight parts are now presented with title-page and index in form for 

 binding as Vol. I. A measurement table, designed by Mr. Tutcher, 

 for ascertaining enlargement, reduction and proportions, with directions 

 for its use, is added in an Appendix. 



Cordial thanks are offered to the Subscribers for their kind support, 

 and to all those who have assisted with advice, with information, with 

 loans of specimens, for these or future parts ; also to reviewers for kindly 

 notices, and to those who have otherwise helped to make the work known. 



The desirability of illustrating types of Yorkshire authors other than 

 those mentioned in the Introduction has been brought to the Editor's 

 notice, on the ground of making the work as completely informative as 

 possible. On similar ground has been urged the desirabilityj^^ illustrating 

 types, not of Yorkshire, having special bearing on the systematic arrange- 

 ment of Yorkshire species or strata. Agreement with these views is con- 

 fessed : time and the continued support of Subscribers may enable them 

 to be carried out, but the original design must, in the main, have 

 precedence. 



Any limitation of the work to Lias Ammonites was not intended : 

 such limitation in the present volume is due solely to practical con- 

 siderations. Oolitic species will be illustrated as opportunity offers ; 

 for some named by Young & Bird are particularly important. 



Information as to the whereabouts of Yorkshire types will be wel- 

 comed. Information as to the whereabouts of copies of Simpson's 

 1843 work will be interesting. At present, the only copies known to 

 the Editor are in the British Museum, the Library of the Yorkshire 

 Philosophical Society, York (the copy very kindly lent for the purpose 

 of this work), and the Library of the Royal Technical College, Glasgow, 

 a copy with author's corrections (reported by Prof. Daniel Burns). Many 

 well-known Libraries lack the book. 



