114 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. 



collected as many of its fossils as circumstances permitted. These 

 amount to twenty-five species of shells and some fragments of car- 

 bonized wood ; but, with the exception of two Ammonites (A. Kce- 

 nigi and A, sublcBvis), they are either enumerated in the lists published 

 by Sir R. I. Murchison*, are undescribed species, or are too imper- 

 fect for satisfactory determination. 



Eighteen of the shells are also found in different members of the 

 Jurassic (oolitic) series of England, and of these the following occur 

 in the unusually developed Kelloway Rock of Yorkshiref : — 



Ammonites Gowerianus, Sow. Pecten lens, Sow. 



Koenigi, Sow. Modiola cuneata, Sow. 



subhevis, Sow. Trigonia clavellata, Sow. 



Ostrea archetypa, Phil. Goniomya literata, Sow. 



The Ammonites Kcenigi and A. sublcBvis are also associated in the 

 equivalent strata at Kelloways Bridge, Wilts., and, as well as the A. 

 Gowerianus^ in the contiguous Oxford clay of Chippenham. These 

 facts afford additional proof that the position long ago assigned to 

 the bed in question by Sir R. Murchison, who regarded it as the re- 

 presentative of the " pier stone" of Scarborough, is the correct one J. 



Fie^. 1. 



This marine deposit (Section fig. 1) is succeeded, in the descending 

 order, by the following strata : — 

 a. Coal (main seam), 3 feet. 

 h. Dark grey shale with seams of coal, 20 ft. 6 inches. 



c. Seven or eight seams of black, bituminous shale, full of shells, 

 &c., and alternating with unfossiliferous partings of the same rock. 

 The fossils comprise detached scales o^ Lepidotus pusillus (sp. nov.) 

 and Pholidophorus cognatus (sp. nov.), Paludina conulus (sp. nov.), 

 Cyclas angulata, Sow., C. subglobosa (sp. nov.), C. rhomboidalis 

 (sp. nov.), C. solidula (sp. nov.), C. unioniformis (sp. nov.), and 

 Cypris granulosa^ Sow. There are also portions of an obscure plant, 

 and small fragments of carbonized wood. The thickness of the whole 

 is 5\ inches. 



d. Shale like b, but without coal, 3 ft. 1 inch§. 



e. Black, grey and green clays, including a layer of whitish argil- 

 laceous limestone. The fossils, which, although broken and disunited, 

 constitute at least one half of the mass, are Semionotus punctatus 

 (sp. nov.), S. minor (sp. nov.), Lepidotus pusillus (sp. nov.), Pho- 

 lidophorus cognatus (sp. nov.), Paludina conulus (sp. nov.), Perna 

 erecta (sp. nov.), P. obliquata (sp. nov.), Tellina muriatica (sp. nov.) 



* Trans. Geol. Soc. 2nd Series, vol. ii. pp. 320 and 366. 



t Prof. Phillips's ' Geology of Yorkshire Coast,' 2nd edition, p. Ill et seq. The 

 shell figured in this work as Rostellaria composita is (unless very inaccurately re- 

 presented) not identical with thefossilfromBrorasonaraedin * Mineral Conchology.' 



+ Trans. Geol. Soc. 2nd Series, vol. ii. pp. 297-8, 316-7. 



§ It being impracticable to subject the beds b and dto direct measurement, their 

 thicknesses were calculated from the usual data. 



