172 Arthur Burnet — The Tipper Chalk of North Lincolnshire. 



Professor Hull and Dr. Irving." By the irony of fate he has chosen 

 for the reading of his paper the very place (Southport) at which 

 a paper by the present writer (after a Summer's work in Germany) 

 carried conviction to the mind of Professor Hull as to the true 

 divisional line between the Permian and the Trias in England and 

 on the Continent. See Report of the British Association, Southport 

 Meeting, 1883. 



Mr. Somervail has been good enough to send me also a copy of 

 a paper read at Sidmouth last Summer.* There is much in that 

 paper that one appreciates, and not much to criticise beyond what 

 one has already dealt with. He seems, however, to speak of the 

 ' Waterstones ' as forming the base of the Keuper in the Midlands, 

 which scarcely harmonises with the use of that term by previous 

 writers, and notably by Professor Hull in his classic memoir on the 

 Permian and Trias, to which reference has been made above. It 

 does not reveal any intimate acquaintance on the writer's part 

 with the Midland Eed Eocks, or even with inland sections of the 

 Devon series. 



As to Mr. Somervail's failure and that of his " friend who was 

 visiting Sidmouth " to find the breccia east of the Sid, no more 

 remains to be said here, each reader being left to draw his own 

 inferences. I must, however, traverse his statement that " the 

 succession of beds above it " is not the same in both sections (of 

 the Otter and the Sid). A perusal of the remarks in the foregoing 

 paper will show why here I am also at issue with him. I admit 

 that there is not such a full development of the false-bedded base- 

 ment beds of the Keuper in the Sid section as in the Otter sections 

 2J miles further west; but that is only a quantitative difierence, not 

 at all surprising in these red rocks considering the conditions under 

 which they were deposited. He speaks of an "alleged fault" at 

 the Chit Rock, when the existence of the fault is " as plain as a pike- 

 staff" (or was 15 years ago) to any unprejudiced observer. Of 

 course, the sequence east of the Sid is not repeated at the Chit, 

 because the beds have been destroyed by the erosion of the valley 

 in which Sidmouth lies. 



V. — The Upper Chalk of Nokth Lincolnshire. 

 By Arthur Burnet. 



IN the Summer of 1902 I commenced an exploration of the chalk- 

 pits on the eastern border of the Lincolnshire Wolds, starting 

 at Louth and working northward. Mr. W. Hill had previously 

 visited this locality, and had proved the existence of the zone of 

 Holaster playius at Boswell, three miles north-west of Louth, and 

 also at Kirmington, much farther north.- Mr. Jukes - Browne 



' "The Red Rocks of the South Devon Coast," by Alexander Somervail (Trans- 

 actions of Devonshire Association for the Advancement of Science, etc., vol. xxxv, 

 pp. 617-630). 



* W. Hill, " iS'ote on the Upper Chalk of Lincolnshire" : Geol. Mag., Dec. IV, 

 Vol. IX (1902), p. 404. 



