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PSEUDODIADEMA VARIOLARE (BRONGNIART) IN 

 THE LOWER CHALK OF NORTH LINCOLNSHIRE. 



T. SHEPPARD, M.SC, F.G.S. 



Among a collection of specimens obtained from the well 

 known Chalk Quarry at South Ferriby is a fine and well 

 preserved example of Pseudodiadema variolare (Brongniart), 

 the matrix of which shows that it is from the Marl bands 

 immediately below the Belemnitella plena zone. The specimen, 

 which was sent for examination to the Palaeontological De- 

 partment of the Geological Survey, is 32 mm. in width. So 

 far as I can ascertain, the species has not been recorded for 

 Yorkshire, the only reference to the genus in the Lower Chalk 

 in Yorkshire occurring in Prof. Barrois' paper, ' Recherches sur 

 le Terrain Cretace Superieur de I'Angleterre et de ITrlande,' as 

 having been obtained at Speeton. 



With regard to Lincolnshire, the late Wm. Hill, whose 

 classic paper on the Lower Chalk of that county appeared in 

 the Quart. Journ. Geol. Soc, 1888, p. 320, evidently never 

 succeeded in securing a specimen himself, and the only record 

 I can find of the species for the county occurs in a list of fossils 

 from the Lower part of the Lower Chalk, on page 143 of the 

 Geology of part of East Lincolnshire, Geological Survey 

 Memoir, 18S7. Here the species is recorded as having been 

 found at Grebby, but I cannot find any reference to it in the 

 text of the Memoir. 



More recently {Proc. Geol. Assoc, Vol. XXVL, pp. 333- 

 359) C. R. Bower and J. R. Farmery have made a zoological 

 record of the contents of ' The Zones of the Lower Chalk of 

 Lincolnshire,' and this record contains particulars of several 

 additions to the fossil fauna of the beds described, but even 

 the genus is not mentioned by them ; thus the fossil would 

 seem to be very rare. 



A little while ago the Hull Museum purchased from Mr. 

 Bower the fossils figured and described in this paper ; among 

 them are portions of one or two immature individuals which 

 might possibly be referred to Pseudodiadema, but are not 

 sufficiently well preserved to enable the staff at the Geological 

 Survey Office to define. I am informed that the Grebby 

 specimen is in the Museum at Jermyn Street, so that this 

 example, which is not a particularly good one, and that now 

 described, appear to be the only two records of Pseudodiadema 

 variolare for the Chalk of the North of England, 



The Haworth Ramblers continue to issue their valuable programmes, 

 the one for Easter Monday, on Giggleswick and Settle, being of special 

 interest. It deals with the Museum, Ebbing and Flowing Well, etc., 

 and is written by Jonas Bradley. 



1921 May 1 



