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comparing opinions with facts, and deducing conclusions on 

 the spot. It is the resxilt of this examination, so interesting 

 to all students of Jurassic Geology, that I now propose to lay- 

 before the members of the Cotteswold Club. 



The Department of the Cote-d'Or comprehends the northern 

 portion of the Duchy of Burgundy; it has the form of an 

 irregular oval ; is in length, from north to south, about sixty- 

 five miles, and in breadth, from east to west, from twenty-five 

 to fifty miles, with a superficial area of 3430 square miles. It 

 is divided into four "arrondissemens communaux" — Dijon, 

 Beaune, Chatillon, and Semur. Dijon is the ancient capital 

 of Burgundy, and the chef-lieu of the Department of the Cote- 

 d'Or. This region contains a very complete development of 

 the different Jurassic formations which have formed the subject 

 of many important memoirs made, from time to time, by some 

 of the most eminent French geologists, and the result of their 

 labors is seen in the accurate description of the different stages 

 which are here exposed. As I was desirous of possessing the 

 best teaching on this subject before bringing the matter before 

 our members, since my return home, I addressed a letter 

 to M. Jules Maktin and begged of him to favor me with a 

 Stratigraphical table of all the stages of the Jurassic rocks 

 exposed in the Cote-d'Or, and to add to each zone a short 

 list of the leading fossils contained therein, in order that I 

 might be enabled to compare correctly the French series with 

 our English beds. I was the more anxious to possess this 

 information from M. Maktin himself, as he has made the 

 Geology of his Department the subject of extensive studies, 

 and has carefully examined the Palseontology of all the beds. 

 M. Martin kindly and promptly complied with my request, 

 and I have very great pleasure in publishing his letter, and, 

 at the same time, offering him our united thanks for this 

 important communication : — 



" Dijon, le 20 Aout, 1869. 

 "Cher Monsieur, 



Je m'empresse de deferer a votre desir en vous adressant 

 ci-apres le tableau sommaire de la constitution des etages 



