25't Mr. De la Beche OJi theGeographicalDistribution of Organic 



Organic Remai7is of the Cornbrash and Forest Marble, — North 

 of France.* 



Avicula echinata. 

 Plagiostorna cardiifoi'me, 

 Pecten Jibrosus. 



lens, and two others. 



Terebratula subrotunda. 

 Spatangus- 



Nucleolites columbaria. 

 Millepora- 

 Fish teeth. 



Gryphaea lituola. 



Ostrea, large and flat, hinge verj' 

 broad. 



It will at once be observed how very little the lists of or- 

 ganic remains enumerated at the different localities agree with 

 each other. Unfortunately we have no good detailed and pub- 

 lished lists of fossils in the rocks under consideration, either 

 in our midland or southern counties ; but as Mr. Conybeare's 

 listsf are principally compiled from these parts of England, 

 I shall employ them, though by their general nature they do 

 not exactly enter into the object of these notes, adding those 

 fossils that have appeared in Sowerby's Min. Conch, since the 

 publication of the " Outlines." 



The additions to Mr. Conybeare's lists are, for the cornbrash, 

 Mytilus sublaevis, Isocardia concentrica, Pecten annulatus, and 

 Perna qiiadrata; — for the Stonesfield slate, Patella lata; — and 

 for the Bradford clay, Terebratula coarctata, and Serpula tri- 

 angulata. The additions to the list of great oolite fossils are 

 considerable; the following are all from Ancliff in the environs 

 of Bath. 



Fossils of the Great Oolite, — Ancliff. 



Astarte orbicularis. Terebratula furcata. 



pumila. hemisphaerica. 



Cucullaea minuta. 



rudis. 



Pectunculus minimus. 



oblongus. 



Area pulchra. 

 Nucula variabilis. 



mucronata. 



Ostrea obscura. 



costata. 



Gryphaea minuta. 

 Trigonia imbricata. 



cuspidata. 



PuUus. 



Terebratula flabellula. 



Orbicula granulata. 

 Patella ancyloides. 



nana. 



Eniarginula scalaris. 

 ActEeon cuspidatus. 



acutus. 



Nerita minuta. 



costata. 



Turbo obtusus. 

 Rissoa laevis. 



— acuta. 



obliquata. 



duplicata. 



Buccinum unilineatum. 



* Boblaye, Ann. des Sci. Nat. vol. xvii. pp. 62, 63. 



t Outlines of the Geology of England and Wales, p. 206—212. 



Comparative 



