14 



PROCEEDINGS OP THE GEOLOGICAL SOCIETY. [Apr. 6, 



Cyprina picta, Lye. 

 Lucina Orbigniana, d'Arch. 

 Astarte depressa, Goldf. 



■ bullata, Lye. 



transversa, Lye. 



excavata (var. cornpressiuscula), 



Sow. 

 Myopsis punctata, Buck. 



compressus, Lye. 



Goniomya angulifera, Sow. 

 Anatina pinguis, ? Agass. 

 Ceromya concentrica, Sow. 



Terebratula submaxillata, David. 



fimbria, Sow. 



carinata, Lam. 



galeiformis, David. 



■ plicata, Duck. 



simplex, Duck. 



Rhynchonella subobsoleta, David. 



concinna, Sow. 



subtetrahedra, David. 



Lycetti, David. 



Pedina Bakeri, Wright. 

 Stomechinus germinans, Phil. 

 Polycyphus Deslongchampsi, Wright. 

 Pseudodiadema depressum, Agass. 



Cladophyllia, sp. 

 Cosmoseris vermicularis, M'Coy. 

 Convexastrasa Waltoni, Edw. §• Haime. 

 Isastrasa limitata, Lamx. 



Davidsoni, Edw. $■ Haime. 



Thamnastrsea Defranciana, Michl. 

 — — concinna, Goldf. 



Mettensis, Edw. $ Haime. 



Stylina solida, M l Coy. 



Many of the Gasteropoda, and most of the Conchifera, in the above 

 were collected by my friend Mr. Lycett, chiefly from the marl near 

 Nailsworth ; the BracMopoda and Ecliinodermata I collected at Hart- 

 ley Bottom, near the Seven Springs ; the Corals were collected near 

 Cheltenham by myself, and near Sheepscombe and Birdlip by my 

 friend Mr. J. Jones. To Mr. Lycett we are indebted for cataloguing 

 most of the species of Mollusca. 



B. Section VI. — At the Peak near Robin Hood's Bat, 

 Yorkshire Coast. 



a. The Zones of Ammonites Murchisonse and A. Hnmphriesianus. 



The middle and lower subdivisions of the Inferior Oolite, together 

 with the zone of Ammonites Jurensis, are admirably exposed in the 

 magnificent coast- section at the Peak near Robin Hood's Bay. 



No. 1. On descending from the top of the cliff about half a mile 

 south of Peak Hall, we first pass over some beds of the upper sand- 

 stones ; they are of a slaty structure, and are much shivered. Be- 

 neath these — 



No. 2. The Grey Limestone ("Bath Oolite" of Phillips) forms 

 two conspicuous bands in the cliff, separated from each other by 

 softer shaly beds. This rock is very hard and persistent ; and the 

 shales above and below it having been decomposed, it stands out 

 in relief. The oolite may be from fifteen to twenty feet thick, and 

 is fossiliferous. 



No. 3. The Block Sand-rock crops out beneath the grey lime- 

 stone. It is in part a thick-bedded sandstone, which forms a very 

 prominent band in the cliff. The lower part of this bed becomes 

 slaty where it rests upon the Millepore-rock. 



No. 4. The Millepore-bed is a hard crystalline calcareo-siliceous 

 rock, partly oolitic, abounding with fragments of Crinoids, Echino- 

 derms, Polyzoans, and shelly fragments. 



No. 5. The Millepore-rock rests upon a bed of thick sandstone, 



