358 LIME8T0NE-ZN0LLS IN CRAVEN. [^^g- 1 899, 



by Mr. Tiddeman, while the account of ancient coral-reefs given 

 by Dupont ^ and Mojsisovics ^ may also be quoted against me. Lest 

 I should be charged with presumption, I may add that it is now 

 nearly twenty years since the subject first attracted my attention, 

 and I have devoted some time to it intermittently ever since. 

 Should the main contention of this paper be proved incorrect, I 

 venture to hope that in any case there are observations recorded in 

 it which may prove to be of interest. 



PLATE XXIV (facing p. 339). 



View of knolls near Scaleber, Settle, reproduced from a photograph taken by 

 E. J. Garwood, M.A., F.G.S. 



[For the Discussion on this paper, see p. 361.] 



^ Dupont, E., * Les lies coralliennes de Eoly et de Philippeville,' Bull. Mub, 

 Roy. Hist. Nat. Belg. vol. i (1882) p. 89. 



^ Mojsisoyics, E. Ton, ' Dolomitriffe von Siidtirol u. Venetien,' 1879. 



