Morris — Oolites of Northampton, 8fc. 103 



Casterton, near Stamford, and in the Essendine and Danes Hill 

 Cutting of the Great Northern Eailway.^ 



The similarity in position of the ferruginous rock, between the 

 Lias and White Oolites, is seen in the Spittlegate Cutting, and to 

 the south of it at Ponton, in the same railway ; also in the neigh- 

 bourhood of Lincoln, where the Lias, which occurs in the Valley of 

 the Witham, is overlain by the ferruginous bed, which, in its turn, 

 is covered by compact white Oolitic limestones, yielding durable 

 stone for building purposes^ (the " Silver-bed" and Eoestone-bed), 

 and containing Mollusca of Inferior Oolite age, as Ceromya Bajoci- 

 ana and other species. 



Further north, as well known to Professor Phillips, the ferrugi- 

 nous beds at Brough, on the Humber, containing numerous Bhyn- 

 chonella spinosa, and other shells, are followed in that area by beds 

 known as the Cave Oolite, which is the equivalent of the limestones 

 of Whitwell and Weston. 



Fossils of the Lower White Limestones of Morcot, Stamford, 

 Denton, etc. : 



Natica cincta, Phil. Nerinma cingenda, Phil. N. triplicata, Br. 

 Lucina Wrightii, Op. L. despecta, Phil. Ceromya Bajociana, D'Orb. 

 Pholadomya fidicula, Sow. Hinnites abjectus, Phil. Gervillia Hart- 

 manni? ::= G. radians, Lye. Lima Pontonis, Lye. Z. hellida, Lye. 

 L. cardiifo7-mis, Sow. Macrodon Hirsonensis, D'Arch. Trigonia PJiil- 

 lipsi, Lye. T. hemisplierica, Lye. Tancredia axiniformis, Phil. Ino- 

 ceramus obliquus, Lye. Astarte elegans, Sow. A. minima, Phil. Pecten 

 jpumilus, Lam. CucuUcea cancellata, Phil. Ostrea sidcifera, Phil. Go- 

 niomya v — scripta, Sow. — Pygaster semisidcatus , Phil. Hyhoclypus 

 agariciformis, Forbes. Stomechinus germinans, Phil. Ecliinus perlatus, 

 Desm. Pseudodiadema depressum, Ag. Echinopsis rotata. — Pecopteris 

 polypodioides, Pterophyllum comptum, Palceozamia pecten. 



Fossils of the Collyweston Slates : 



Pecten pumilus, Lam. {P.personatus, Ziet.) Avicida elegans, Munst. 

 A. Braamburiensis, Phil. Hinnites velatus, Goldf. Gervillia acuta,, Sow. 

 Pinna cuneata, Sow. Modiola Sowerbyana, D'Orb. Astai-te excavata, 

 Sow. Trigonia costata. Sow. T. compia, Lye. Oucidlcea cancellata. Ph. 

 Pholadomya fidicula. Sow. Ceromya Bajociana, D'Orb. Cardium Buclt- 

 mani, Lye? Lucina Wrightii, Op. Goniomya literata. Sow. Homomya 

 crassiusGida, Lye. ? Lingula Beanii, Phil. Perna rugosa, Goldf. — 

 Pterocera Bentleyi, Lye. Alaria Phillipsi, D'Orb. 



Brief and imperfect as is this notice, I think that the facts pre- 

 viously stated suggest that the position of certain parts of the Lower 

 Oolites should be reconsidered, and that attention should be drawn 

 to the following points. 



1. That the red or ferruginous rock, immediately overlying the 

 Lias, and extending over the district watered by the Nen and the 



1 Morris, Quart. Journ. Geol. Soc, ix. p. 330. 



2 W. Bedford, Account of the Sti-ata of Lincoln, Mag. Nat. Hist. 1S39, p. 653. 

 The Cathedi-al is built of the " silver-bed" and of the beds below it; the Eoestone 

 ■was used for the construction of Newport Arch, built by the Eomans. 



