﻿304 



PROCEEDINGS OF THE GEOLOGICAL SOCIETY. 



[Mar. 6, 



It occurs at Bull Hill, Bag Hill, and other localities about Ponte- 

 fract, at Wentbridge, Hampole Stubbs (Stubbs Hill, Sedgivick), 

 Hampole, Moorhouse, Pickburn, Brodsworth, Conisborough, Hooton 

 Pagnell, Emsall, Barnborough Cliff, Cadeby, Braithwell, and near 

 Micklebring, all localities of the Lower Limestone, and in all of 

 which it is common. 



2. Gervillia keratophaga, Schlotheim, Denksch. Akad. Miinch., 



toI. vi. p. 30, pi. 5. fig. 2. 

 Syn. BalcevelUa bicarinata, King. 



Specimens of this species occur more rarely than those of the pre- 

 ceding. They never attain the size of the largest Durham specimens, 

 though in common with those they possess the same obliquity of 

 valves, forked posterior margin, and prominent and somewhat distant 

 lines of growth that characterize the species. 



It occurs at Brodsworth, Pickburn, and, I think, in other localities ; 

 but the preservation of the specimens is such as will not allow me to 

 speak positively on the matter. Prof. King gives the neighbourhood 

 of Pontefract as a locality for it. 



3. Myalina Hausman^i, Goldfuss, Petrefacten, part 2, p. 168. 

 Syns. Mytilus squamosus and M. acuminaUis, J. de C. Sowerby ; 



and Mytilus septifer, King. 



Generally about half-an-inch long, rarely an inch. Not very 

 common. Occurs both in the Lower Limestone and the Brotherton 

 Beds, being much dwarfed in the latter. 



Loc. Lower Limestone ; Bull Hill Quarry near Pontefract, Ham- 

 pole Stubbs, Barnborough Cliff, near Sprotborough, Conisborough, 

 Brodsworth, and Moorhouse. Brotherton Beds; Hampole Quarries*, 

 Knottingley, and Loversall. 



4. Myoconcua costata, Brown, Trans. Manch. Geol. Soc, vol. i. p. 



32, pi. 6, figs. 34, 35. 



Specimens of this species are not rare. They never exceed fibs of 

 an inch in length, have generally rather convex valves, slightly curved 

 dorsal and ventral margins, with well-marked posterior ribs, and the 

 surface covered with strong lines of growth. 



Loc. Brodsworth, Hampole Stubbs, near Barnborough Cliff, 

 Moorhouse, Hampole, and Bull Hill near Pontefract, all in Lower 

 Limestone. 



5. Cardiomorpha Pallasi, De Verneuil, Geol. Kuss., vol. ii. p. 316. 

 Syn. C. modioliformis, King. 



A single right valve of this species occurred in the Lower Lime- 

 stone at Brodsworth. It is J-ths of an inch long, is strongly angu- 

 lated, has its umbone depressed, and appeal's to have had a very 

 thin shell. 



* "Hampole Quarries" is the name on the map of the Ordnance Survey for 

 the quarries on each side of the Great North Road, a little to the north of the 

 Holmeroyd Bridge and a mile to the east of Hampole village, and rather more 

 than a mile to the east of the old quarry of Lower Limestone so often mentioned 

 in this paper as the locality of ' Hampole." 



