78 GASTEROPODA OF THE INFERIOR OOLITE. 



obscure problem presented by the Inferior Oolite Gasteropoda in the Cotteswolds. 

 Nor should I, when on the subject of Cotteswold fossils, forget the kindness of the 

 Rev. P. B. Brodie. This veteran geologist, years ago, made it his business to 

 collect specimens principally from the Freestones of Leckhampton and the neighbour- 

 hood. These he most generously permits me to examine and to retain for figuring 

 when necessary. I have long been under obligations to Mr. Walford, of Banbury, 

 whose intimate acquaintance with the Inferior Oolite of North Oxfordshire 

 has been proved more than once in the pages of the ' Quarterly Journal of the 

 Geological Society.' Nor must I forget to thank Mr. George and Mr. Beeby 

 Thompson, of Northampton, for assistance and information in their own district. 



The principal museums, whose collections have been consulted, are — the 

 British Museum, the Museum of Practical Geology in Jermyn Street, the Bristol 

 Museum, the Woodwardian Museum, and, for Yorkshire fossils only, the York 

 Museum. Nothing could exceed the kindness and consideration of the officers in 

 charge, and I tender them my heartfelt thanks. 



List of some op the Works consulted. 



Published previous to 1840. 



1812-29 Sowerby. The Mineral Conchology of Great Britain. 6 vols. 

 1822 Young and Bird. A Geological Survey of the Yorkshire Coast. 

 1829, '35 Phillips. Geology of the Yorkshire Coast. 

 1831 Deshayes. Description des Coquilles caracteristiques des Terrains. 



1836 Voltz. On the genus Nerincea in the Neues Jahrbuch. 



— Roemer. DieVersteinerungendesNord-deutchenOolithen-Gebirges. Hanover. 

 1839 Ein Nachtrag. 



1837 Koch and Dunker. Beitrage des Nord-deutchen Oolithgebildes. Brunswick. 



— Bronn. Lethasa Geognostica. Stuttgart} 



1835-1845. Deshayes. Lamarck's Hist. Nat. des Anim. sans vertebras. 3rd Ed. 



Between 1840 and 1849. 



1842 Eudes Deslongchamps. Several memoirs on Jurassic Gasteropoda. Mem. Soc. 



Linn. Norm., vol. vii. 



1843 D'Archiac Formation oolithique de l'Aisne. Mem. Soc. GeoL de France. 



1 Second edition published in 1856. This I have not seen. 



