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PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [Jan. 8, 



List of Fossils from the Limestones, Grits, and Shales of the Upper 

 Oolite of Sutherland (KintradweU, Garty, Port Gower, Helms- 

 dale, Navidale, Sfc). 



Plesiosaurus, sp. 

 Gyrodus Goweri, Eg. 

 Other fish-remains. 

 Belemnites abbreviates, Mill. 



■ obeliscus, Phil. 



spicularis, Phil. 



Ammonites triplicatus, Sow. 



'-■ altemans, von Buck. 



flexuosus, Mun&t. 



Beaugrandi, Sauv. et Big. 



biplex, Sow. 



, Sow., var. 



mutabilis, Sow. 



Eudoxus, B' Orb. 



Calisto, D'Orb. 



autissiodorensis, Gotteau. 



■ Achilles, Be Loriol (non B" 1 Orb.). 



Cerithium, sp. 



Chemnitzia, sp. 



Nerita, sp. 



Natica vespa, Be Loriol. 



Pleurotomaria, sp. 



Pterocera, sp. 



Turbo, sp. 



Trochus, sp. 



Lithodomus, sp. 



Cardium Dufrenoyeum, Buv. 



morinieum, Be Loriol. 



Lueina substriata, Rom. 

 Cucullasa, sp. 

 Astarte, spec. nov. 

 Lima eoncentrica, Sow., sp. 



The beautiful flora of these beds, the age of which is now placed 

 beyond all question as that of the Upper Oolite, will be made the 

 subject of a critical study by Mr. Carruthers. It will form a new 

 and highly interesting link in the history of vegetable life. 



The shales, grits, and limestones just described are covered con- 

 formably by a considerable thickness of soft, generally fine-grained 

 sandstone, which in places is indurated into a hard, quartzite-like 

 rock. In their lower part these sandstones are light-coloured, 

 though often stained and banded with ferruginous matter. In their 

 upper part, however, they become very ferruginous, in places passing 

 into an impure ironstone rock, which, by weathering along the joint- 

 planes, assumes the peculiar " cellular" aspect so characteristic of the 

 Northampton Sand of England. As far as I have been able to observe, 

 these sandstones are totally destitute of fossils ; and I regard it as 

 probable that, like great portions of the formation which they so greatly 

 resemble in mineral characters, they are of estuarine origin. The 

 rock abounds with spherical cavities, evidently caused by the 

 removal of some foreign matters, probably nodules of iron-pyrites. 



The greatest thickness exposed of this sandstone series is about 

 100 feet, and is seen just north of the Allt-a-ghruan, between the 



Lima la2viuscula, Sow. 

 Avicula expansa, Phil., var. • 

 Placunopsis, spec. nov. 

 Hinnites insequistriatus, B' Orb. 

 Pecten vimineus, Sow. 



,sp. 



■ , sp. 



Exogyra nana, Sow. 



spiralis, Goldf. 



Ostrea (Exogyra) Bruntrutana, 

 Thwrm. 



Boemeri, Querist. 



solitaria, Sow. 



expansa, Sow. 



gessoriacensis, Sauv. et Rig. 



Rhynchonella Sutherlandi, Bav. 



, sp. allied to B. triplicosa, Quenst. 



, sp. 



Terebratula Joassi, Bav. 

 Waldheimia humeralis, Rom. 

 Serpula Boyeri, Be Loriol. 

 —, sp. 

 Cidaris, sp. (spines). 



(spines). 



Acrosalenia, sp. (spines). 

 Isastrsea oblonga, Edw. 8f H. 

 Thamnastrjea, sp. 

 Bennettites Peachianus, Carr. 

 Various Cycads. 



„ Ferns. 



„ Coniferas. 



