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 OF tHE WORKS CONSULTED. 
Published previous to 1840. 
1812-29 Sowrrsy. The Mineral Conchology of Great Britain. 6 vols. 
1822 Younc and Birp. A Geological Survey of the Yorkshire Coast. 
1829, ’35 Puitups. Geology of the Yorkshire Coast. 
1831 Dersnayns. Description des Coquilles caracteristiques des Terrains. 
1836 Vourz. On the genus Nerinea in the Neues Jahrbuch. 
— Roemer. Die Versteinerungen des Nord-deutchen Oolithen-Gebirges. Hanover. 
1839 Ein Nachtrag. 
1837 Kocn and Dunxsr. Beitriige des Nord-deutchen Oolithgebildes. Brunswick. 
— Brown. Lethza Geognostica. Stuttgart.’ 
1835-1845. Drsnayes. Lamarck’s Hist. Nat. des Anim. sans vertébres. 3rd Ed. 
Between 1840 and 1849. 
1842 Eupns Drstoncconamps. Several memoirs on Jurassic Gasteropoda. Mém. Soc. 
Linn. Norm., vol. vii. 
1843 D’Arcuiac. Formation odlithique de Aisne. Mém. Soc. Géol. de France. 
1 Second edition published in 1856. This I have not seen. 
