143 



On the Correlation of the Jurassic Rocks, in the Department of the 

 Cote-dJ'Or, France, with the Oolitic formations in the counties of 

 Gloucester and Wilts, England. By Thomas Weight, M.D., 

 F.R.S.E., F.G.S. 



On returning from Switzerland last summer, I determined to 

 visit my former correspondent on Jurassic Geology, M. Jules 

 Martin, F.G.S., of Dijon, author of several memoirs on that 

 subject, for the purpose of paying my personal respects to him, 

 and at the same time examining the fine collection of Fossils 

 he had collected from all the different stages of the Terrains 

 jurassiques, so well developed in the Department of the 

 Cote-d'Or. M. Martin's admirable Monograph,*" Paleontologie 

 Stratigraphique de I'lnfra-Lias du Departement de la Cote-d'Or, 

 had likewise long interested me, and I was very desirous of 

 studying, from my own point of view, the Liassic Fossils so 

 well described and figured in that work 5 more especially so, 

 as it appeared to me, that the term Infra-Lias, as used by my 

 friend, had given rise to much misapprehension on this side of 

 the channel, in reference to the triie position, character, and 

 fauna of the beds he had described under that name. M. 

 Martin received me in the kindest manner, and with great 

 courtesy opened his numerous cabinets for my careful inspection, 

 placing before me, for examination, all the type specimens he 

 had figured and described in his works. The fossils are all 

 neatly mounted on tablets, and most carefully described on the 

 labels attached to each ; the whole are disposed in glass cases, 

 and stratigraphically arranged in stages as they lie naturally 

 in the different super-imposed beds. The examination of such 

 a collection is an easy and satisfactory one, and affords an 

 observer acquainted with the subject the best means of 



* M^moires de la Soci^te G^ol. de France, 2e Serie, tome vii, Mem. No. 1. 

 M 



