1873.] SHAEP OOLITES OP NOETHAMPXONSH1EE. 245 



6. Slate bed — the lower surface moulded into flattened 



hemispherical forms. [These beds (5 & 6) repre- 

 sent the slate beds (7) of Morris.] 



7. Sand (Lower Estuarine) ] AT ,, , „ -, 



8. Ferruginous beds ' ) Northampton Sand. 



During my recent visit, I carefully took notes of two sections 

 somewhat widely separated, adopting for the several beds the familiar 

 names given them by the quarrymen ; and I will here parenthetically 

 suggest that it would be desirable generally to adopt the plan of 

 taking such names, as these would serve for the purposes of iden- 

 tification and comparison upon future visits of geologists, and in 

 after times, even though the exact sections described may have long 

 since disappeared. These two sections so nearly tallied in every 

 respect, except as to thickness, that one table will serve to describe 

 both. 



Section of Slate Quarries, Collyweston, Sept. 1872, ivith Quarry- 

 men's Terms. 



Perkins's Pit. Hill's Pit. 

 ft. in. ft. in. ft. in. ft. in. 

 1. Broken stone, in thin layers (Natica LecJc- 



hamptonensis, Lycett) 1 0to2 2 to 3 



2; "Bed Cale" — very oolitic stone, like bad 

 Ketton freestone, in thin courses. [These 

 beds together represent bedsi 1 & 2 of 

 Professor Morris's section.] 6 6 to 7 



3. "White Cale" — compact marly limestone 



(Pecopteris polype-diodes, in densely filled 

 patches and with fronds in fructification, 

 Hinnites velatus, Lima, sp., large Pecten 

 aratus, Pecten lens, Cypricardia nuculi- 

 formis, Unicardhtm impressum, Nerincea 

 cingenda, &c). [Bed 3 of Morris, 1 of 

 my former section.] 1 to 1 6 1 G to 2 



4. Sandy soft bed. [4 of Morris, 2 of my 



former section.] 9 10 



5. "Bingstone" — large oolitic grains in a very 



hard crystalline matrix (Modiola Bin- 

 fieldi ?). [5 of Morris, 3 of my former 

 section.] 6 8 



6. "Top Sand" — the peculiar laminated bed 



of my former section. The layers are 

 somewhat inclined in Perkins's pit, but 

 more so in Hill's pit, and very distorted 

 in others. [6 of Morris ?, 4 of my former 

 section.] 2 2 to 2 6 



7. " Brood " — a hard oolitic limestone, in 



courses of about 6 inches thickness, a 

 good building-stone {Natica Leckhamp- 

 toncnsis, large new Lima *). [Wanting 

 in Morris's section.] 3 1 



8. " The Hard Sand " — a variable bed, some- 



times much thicker (large Natica Leck- 

 hamptonensis, Cardium Buckmani, Os- 

 trea). [6 of Morris ? This and the last 

 beds are wanting in my former section.] 10 



* Allied to L. grandis, Bonier ? 



