1873.] BHAKP— OOLITES OP XOETnAMPTOITSKIRE. 251 



ft. in. ft. in. ft, in. ft. in. 



d. " Bottom Course " — good freestone, but rather 



coarser in grain 2 0to2 6 



e. Hard band of crystalline limestone, full of 



comminuted shells 6 



/. Marly beds, not worked. 10 6 to 12 9 



Fossils from Freestone Bed, Simpson's Quarries. 



Avicula, smooth species. 

 Lima proboscidea, Soiu. sp. 

 Ostrea gregaria, Sow. 



sulcifera, Phil, i 



Lucina Wrightii, O-ppel. 



Homomya (Myacites) orassiuscula, 



Mor. §■ Lye. 

 Trigonia costata, var. pullus, Sow. 

 Unicardium depressum, Phil. 



Terebratula globata, Sow. 



perovalis, Sow. 



Chemnitzia vetusta (?), Mor. §• Lye, 

 Watica Leckhamptonensis, Lyoett. 

 ]Nerina3a cingenda, Bronn. 



■ Cotteswoldiai, Lyoett. 



, sp. ? (like funiculus, Deslong.), 



Trochus spiratus (?), d'Arch. 

 Pseudodiadema depressum, Ag. 



At a little less than a mile north of Simpson's quarries, after, by 

 a gradual descent, successively passing over the outcrop of the lower 

 beds of the Lincolnshire Limestone, the Slate beds, and the Lower 

 Estuarine and the Ferruginous beds of the Northampton Sand, (beds 

 of the Great Oolite Limestone and the Upper Estuarine constituting 

 the high tract to the east,) we come, at Casterton Parva, to the 

 valley of the small Rutland river, the Gwash (Gausenna of the 

 Romans) ; which flows over the Ferruginous beds of the North- 

 ampton Sand. 



Nearly thirty years ago, a well of no great depth was sunk at 

 this village, and a green and very fossiliferous phase of these beds 

 was reached. From this bed Mr. Bentley and I obtained specimens 

 containing numerous shells in excellent condition. The mineral 

 character of these beds is very much like that of beds in the same 

 position at the Duston ironstone quarries near Northampton, and is 

 probably attributable (as I explained in my First Part) to the fact 

 that the thickness of the overlying beds has prevented atmospheric 

 oxidation. The fossils as a group correspond with those obtained 

 from the upper portion of the Ironstone beds at Duston. 



Fossils from Green Beds of Northampton Sand, from Well at 

 Casterton Parva, Stamford, 1844. 



Avicula incequivalvis, Sow. 



sp. ? (young). 



Gervillia, new sp. 

 Hinnites abjectus, Phil. sp. 

 Lima bellula, Mor. § Lye. 



duplicata, Sow. sp. 



Dustonensis, Ethcridgc, M.S. 



pectinoides, Sow. sp. 



Pontonis, Lycett. 



proboscidea, Sow. sp. 



punctata, Sow. sp. 



Eodburgensis, Lycett, M.S. 



, large sp. (allied to L. grandis, 



Bo'mer) ? 

 , large sp. ? 



Lima, sp. 



Ostrea flabelloidcs, Lam. 



sulcifera, Phil. 



Pecten arcuatus, Sow. 



articulatus, Schloth. 



demissus, Phil. 



■ lens, Sow. 



Perna rugosa, Goldf. 



Plicatula tuberculosa, Mor. $ Lye. 



Astarte elegans, Sow. 



Cardium (hear to) Stricklandi, Mor. 



$Lyc. ' 

 Ceromya concentrica, Sow. 

 Cuculkea cancellata, Phil. 



