318 



J. F. BLAKE AND W. H. HFDLESTON ON 



Section at Filey, in descending order, according to the grouping 

 adopted in the Paper already referred to. 



A. The Upper Calcareous Series. 



1. Broken thin-bedded oolites (Coralline Oolite), containing a ft. in 



few fossils — Cerithium limceforme, ActcBonina, Echinobrissus scu- 

 tattis, Holectypus, &c about 5 



2. Coarse gritty limestones, with large oolitic granules, divided by 



and occasionally thinning off into yellow calcareous grits. These 

 in their upper part gradually shade off into the oolite above, and 

 are, in short, a sort of passage-beds between these oolites and the 

 grit of Filey Brigg 8 



The fossils of A. 2 are tolerably numerous, 

 determine the following : — 



We have been able to 



c. Ammonites cordatus, Sow. 

 c. goliathus, B? Orb. 



plicatilis, Sow. 



perarmatus, Sow., var. 



Chemnitzia heddingtonensis, 

 Sow. 



Nerinasa, sp. 



Littorina muricata, Sow., var. 



Pleurotomaria Miinsteri, Bom. 

 v. c. Exogyra nana, Sow. 

 v. c. PecLen fibrosus, Sow. 



vimineus, Sow. 



Lima, sp. 



Lima elliptica, Whit eaves, 

 c. Gervillia aviculoides, Sow. (very 



large). 

 c. Trigonia (clavellate sp.). 

 v. c. Lucina Beanii, Lye. 

 v. c. , sp. {cf. lirata, Phil.). 



Astarte, sp. 



Sowerbya triangularis, Phil. 



Pholadomya decemcostata, Rom. 



Myacites jurassi, Brongn. 



Gresslya peregrina, Phil. 



Goniomya literata, Sow. 



ft. in. 



B. 



Massive yellow calcareous grits, poor in lime ; in some situations 

 laminated towards the base; contain a very large variety of Os- 

 trea bidlata, Sow., with occasional specimens of Avicida ovalis 

 and Perna quadrata — Filey-Brigg Calc-Grit 10 



C. The Lower Calcareous Series. 



1. Thin alternations of hard blue gritty limestones, aiul softer yellow 



calc-grits. About 4 feet from the top occurs a rough oolitic 

 limestone in two beds, with Chemnitzia heddingtonensis and 

 some other fossils. The lower portions are sandy, but contain 

 stray specimens of Bhynchonella Thurmanni and some of the 

 commoner forms of the Lower Calcareous Grit 15 



2. Suboolitic gritty limestones and calc-grits, full of dichotomizing 



forms, are highly fossiliferous, especially as regards Brachiopoda, 

 a circumstance which distinguishes them at once from the lime- 

 stones above the Filey-Brigg Calc-Grit 11 







The following are the fossils of C. 2 which we have been able to 

 determine : — 



v. c, 



Belemnites hastatus, Blainv. 

 Nautilus hexagonus, Sow. 

 Ammonites cordatus, Sow. 



goliathus, .D' Orb. 



perarmatus, Sow., var. 



Exogyra nana, Sow. 

 Ostrea solitaria, Sow. 



, sp. {cf. flabelloides, Lam.). 



(gigantic form). 



Gryphaga dilatata, Sow. 

 Pecten fibrosus, Sow. 

 Gervillia aviculoides, Sow. 

 Trigonia, sp. 



Isocardia tenera, Sow. (tumida, Ph.). 



Pleuromya, sp. 



Terebratula fileyensis, Walk. 



Waldheimia Hudlestoni, Walk. 



r. bucculenta, Sow. 



v. c. Rhynchonella Thurmanni, Volte. 



Pseudodiadema versipora, Phil. 

 (small). 



Acrosalenia decorata, Haime (small). 



Echinobrissus scutatus, Lam. 



Astropecten ? (plates). 



Millericrinus echinatus, Gold/. 



Serpula tricarinata. Sow. 



