298 Sir II. H. Howorth — Dislocation of the Chalk. 



In bis "Jurassic Fauna of Kutch " Waagen x refers B. Grantanns and 

 B. Gerardi to distinct species, regarding the former as a synonym 

 of Zieten's B. subhastatns. 



Among the fossils brought by M. Aubry from Choa, Douvillc 

 found only one Cephalopod — a single fragment of a Belemnite — which 

 appeared to him to belong to the group of Belemnopsis sulcata* It 

 seems to have been associated with Trigonia pidlns — a form which in 

 this country occurs in the Lower Oolite — and may be identical with 

 that occurring in Somali-land. 



The Somali specimens are intermediate between the Spiti speci- 

 mens 3 which were figured by Elanford as B. sulcatus and the 

 Cutch specimen 4 figured by J. de C. Sowerby as B. canaliculars, 

 the transverse section of the Somali specimens being somewhat less 

 compressed than the former, and not quite so depressed as the latter; 

 they appear, however, to come rather nearer to the Cutch specimen, 

 and I have therefore placed them with this species, and have adopted 

 Prof. Waagen's identification of the same as B. subhastatns, Zieten. 



Horizon. — Waagen states that B. subhastahis " is not very common 

 in the Kutch Jura, and is apparently restricted to the beds with 

 Steph. macrocephalum," 6 and that B. Gerardi " is entirely wanting 

 in the true Macrocephalus beds, but begins immediately above ir, 

 and extends from here through the whole of the upper part of the 

 Charee group — in other words, it is found in Upper Callovian and 

 Lower Oxfordian beds." 6 In Germany B. subhastatns characterizes 

 the macrocephalus zone. 



IV. — The Dislocation and Disintegration of the Chalk in 



Eastern England and in Denmark. 



By Sir Henry H. Howorth, K.C.I.E., M.P., F.R.S., F.G.S. 



I PROPOSE in the following paper to continue and complete 

 the story which I have partially printed in the Geol. Mag., 

 Feb. 1896, p. 58 ; but first, a few words about the Yorkshire 

 evidence, which I had overlooked. 



Mr. J. F. Blake, speaking of the Yorkshire chalk, says it "has 

 been subjected to the action of some force, which has been strong 

 enough to take hold of huge masses and contort them and stand 

 them on end. A remarkable folding in the rocks was noticed many 

 years ago at Scale Nab, on the coast, by Professor Sedgwick — an 

 equally noteworthy instance of similar action has come under 1113' 

 observation on the summit of the crest between Sherburn and 

 Weaverthorpe. On ascending the hill from Sherburn is a large 

 quarry with the chalk perfectly horizontal, and not more than 20 

 feet above the level of its upper surface are found beds belonging 



1 Pal. Indica, ser. ix, "Jurassic Fauna of Kutch," vol. i, pp. 13, 14, 1873. 



2 Bull. Soc. Geol. France [3], vol. xiv, p. 223. 



3 Now in the Brit. Mus. Coll., Nos. C. 2566-72. 



4 Now in the Museum of the Geological Society of London. 



5 Op. cit., p. 15. 



6 Op. cit., p. 13. 



