Yorkshire Naturalists' Vition ; Annual Rcpurt. itjcxj. ()/ 



through the current year, a representati\e of that zone was found 

 at Hornsea, in June. 



The work, so far, has revealed many new forms, about twenty 

 species having been found either new to Yorkshire record^, or only 

 doubtfully inserted therein. They include at least four species 

 new to science. 



Mr. S. S. Buckman is responsible for the naming of nineteen 

 of that group of twenty species. 



A prolonged search has also been made for certain specimens 

 of well-marked varieties of Danish cretaceous boulders corres- 

 ponding to our chalk, but without success. Although many 

 varieties of chalk were found, none could be asserted to have come 

 from Denmark." 



Mr. H. E. Denham reports the finding in the boulder clay at 

 Aldborough, Holderness, a mass of shelly limestone, Bucklandi 

 zone, containing the ammonite Arieiites scipionanus. The speci- 

 men measured 24 inches in diameter, and is certainly the largest 

 recorded for Yorkshire, and possibly for the British Isles. 



Mr. J. W. Stather reports that large slips of boulder clay 

 have occurred at Yonn Nab, Gristhorpe Bay. Large numbers 

 of boulders were noted, including a fine conglomerate, probably 

 Basement Carboniferous, 4I feet by 3I feet by 2^ feet. 



The excavations for the new dock at Marfleet, near Hull, have 

 disclosed some fine sections in Humber Warps, Forest Bed, and 

 undertying glacial clays. From the latter, two Shap Boulders 

 have been obtained, the larger of which, 16 inches by i^h inches, 

 by the kindess of Mr. ¥. L. Pawley, has been placed in the Hull 

 Museum. 



Mr. Culpin writes : — The excavations made for the engine- 

 house at the new colliery in the valley north of Edlington Wood, 

 3I miles south-west of Doncaster, and i^ miles south-west of the 

 well-known deposit of boulder clay at Balby, have shown that the 

 northern slope of the valley between the 100 to 140 feet contour 

 lines is covered with boulder clay. It varies from a few inches to 

 twelve feet in thickness, and forms a patch about fifty feet wide 

 along the side of the valley, the lower edge being some fifty feet 

 above the bottom of the valley. It contains a mass of ice- 

 scratched Permian Lmiestones, some of which measure forty cubic 

 feet, and there is a sprinkling of grits, ganisters and Carboniferous 

 Limestones, with an occasional ash and basalt. At the upper 

 edge of the boulder clay is some ten to fifteen feet of grey sand, 

 with occasional beds of gravel, streaks of coal fragments, and 

 here and there boulders of Permian Limestone, grits and Car- 

 boniferous Limestones. This sand is probably the washings from 

 the glacial ice. 



The boulder clay and the sand rest on a surface of Upper 

 Permian Limestone, which is here overlooked by the Lower Per- 

 mian Limestone rocks brought up by the Edlington Wood fault. 



1910 Jan. I. 



