YORKSHIRE TYPE AMMONITES— II Mar. 



species but including also types of the British Isles generally is being 

 prepared for issue under the title " Type Ammonites." In size, style, 

 and illustration it will be uniform with this work, but owing to great 

 increase in costs some modifications will be necessary. Of this work 

 information is given in the accompanying leaflet. 



The Editor has much pleasure in offering cordial thanks for very 

 kind assistance. To the helpers already noted (I, E ; II, v) there 

 are gratefully added Sir Aubrey Strahan' Messrs. H. A. Allen, and 

 J. Pringle (Geol. Surv. England) ; Dr. J. S. Flett and Dr. G. W. Lee 

 (Geol. Surv. Scotland) ; the late Mr. G. C. Crick and Mr. W. D. Lang 

 (Brit. Mus. Nat. Hist.) ; Mr. J. Woodhouse Parkinson (Whitby Museum) ; 

 Prof. J. Welsch, Dr. Siemiradzki, Miss Tsytovitch, MM. de Grossouvre, 

 P. Petitclerc, Dr. A. Salfeld, Dr. A. Morley Davies, Messrs. T. Sheppard, 

 A. E. Trueman, L. L. Belinfante, C. P. Chatwin, J. T. Sewell and others. 

 Mr. V. E. Robson, has given very considerable assistance in the preparation 

 of MS. and in many other ways. Mr. J. W. Tutcher has not only fully 

 met the perhaps somewhat exacting demands made with regard to photo- 

 graphic work, but has also continuously rendered great help in various 

 scientific questions. The careful work of the printers (Messrs. Norman, 

 Sawyer & Co.) also deserves grateful acknowledgment. 



Addenda, Corrigenda 

 VOL. I 



(See also Vol. I, p. c) 



Page vi, line 6, for ' bisculaius ' read " bisulcatus " 



P. vii, 1. 4 up, after ' d'Orb.' place ". 



P. viii, 1. 4, for ' Quenst. sp. " This,' read " Quenst. sp." This ". 



P. 3c, 1. 2 up, for ' Cyloceras ' read " Cycloceras ". 



P. yb, 1. 25, for ' ind. band 3 ' read " ind. band 13 " 



P. 9, 1. 1, for ' alteratus,' read " alternatus." 



P. lib, 1. 6, for ' . concavus,' read " a. concavus " 



P. lie, 1. 2, for ' compactilie ' read " compactile. " 



P. 13c, 1. 7, for ' H. compactilis ' read " H. compactile." 



P. 18c, 1. 2, for ' psilnotus ' read " psilonotus " 



P. 25 d. Remove A. lenticularis and A. subnodosus. 



No. 28. Echioceras aureolum is Paratype of Echioceras regustatum, 



see p. 96c. PI. XXVIII to be inscribed accordingly 

 P. 58c, 1. 8, delete 35. 

 P. 62c, 1. 5, delete 35. 

 P. c, 1. 3, for ' 23d ' read " 25d ". 

 P. e, 1. 14, for ' 67 ' read " 69 ". 



P. E, 1. 18 up, for ' as illustrating ' read " of illustrating ". 

 P. E, 1. 5 up, after ' British Museum ' add " also Nat. Hist. Dept." 



(V.E.R.). 

 P. f, for ' Cricone ' read " Criocone " 



