THE MILLSTONE GRITS W. OF HUDDERSFIELD— II.* 



W. S. BISAT. 



As the result of further work in the Huddersfield district, it 

 is possible to put on record the following additional notes 

 of exposures of marine bands in the Millstone Grits of the 

 Marsden area : — 



(i) The clay shales previously recorded as occurring at 

 about 875 ft. O.D. in the banks of Bradley Brook, near Holt 

 Head, have now been examined. Glyphioceras hilingue 

 occurs in profusion, with a few Pterinopecten papyraceiis and 

 Posidoniella Icevis. There is also another goniatite, larger 

 than G. bilingue, not yet identified. 



There seems no doubt that this exposure, and those at 

 Brow Grains and Royd Edge, are in the same beds. 



(2) The Wessenden Valley. — (a) The overflow from 

 Wessenden Old Reservoir cuts through clay shales and forms 

 a picturesque waterfall leading down to the old stream. The 

 section is approximately : — 



Clay shales above the fall with Glyphioceras 

 reticulatum and Pterinopecten papyraceus 

 Rock, forming the upper part of the fall ... 25 ft. 

 Hard Shales, at the foot of the fall, with 

 Lingula, Aviculopecten cf. clathratus, 

 Nuciila, Bellerophon, Sangitinolites 

 occidentalis... ... ... ... ... 18 ft. 



The lamellibranchs I have referred to Sanguinolites 

 occidentalis agree very well with the description and figures 

 given by Hind (Trans. Roy. Soc, Edin., Vol. XLVI., pp. 

 348, 349. PI. 2, Figs. 36-38), and form a new record for 

 Yorkshire. These Nebraskan-Scottish species keep -turning 

 up in the Yorkshire Grits. This makes the sixth North- 

 American species recorded from Yorkshire, the others being 

 Protoschizodus curtus, Schizodus wheeleri, Aviculopecten 

 occidentalis, Aviculopecten carboniferus , Prothyris elegans. 



(b) At the west end of Blakeley Reservoir Embankment 

 is a fine section, approximately as under : — 



Sandstone Rock 



Blue sandy shales 

 Sandstone rock 



Blue shales sandier than] 

 above 30 ft. of shales J 



3oft.+ 

 30 ft. 

 30 ft. 



30 ft. 



"Wet Clay Shales (partially\ 

 obscured by luxuriant vege- 

 tation), turning sandier [• 30 ft. 

 downwards, but probably 

 again clayey at the base j 



Sandstone {A of waterworks 20 ft.-f- 

 sections), at west foot of 

 By wash . 



Numerous cf. Allorisma 

 sulcata at about 17 ft. 

 down, in a very narrow 

 band. 



No fauna seen. 



* For first paper see The Naturalist, November, 1920, pp. 347-352. 

 1921 Jan. 1 



