294 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [April 9, 



tions in Gloucestershire and two in Dorsetshire to prove the stra- 

 tigraphical relations of the Cephalopoda-bed and Sands to the lime- 

 stones of the Inferior Oolite above and the clays of the Upper Lias 

 below. 



. My friend the Rev. P. B. Brodie, in his valuable paper " On the 

 -Basement-beds of the Inferior Oolite *," has already shovra how 

 distinct the Cephalopoda-bed (called by him " the Ammonite and 

 Belemnite bed") is in two of the sections hereafter to be described ; 

 but, in common with all local geologists, myself then among the 

 number, he considered these beds as the lowest of the Oolitic series, 

 and " the greater number of the Belemnites and Ammonites from 

 this division of the Cotswolds as unnamed f ." About two years ago 

 I had the pleasure of submitting my collection of Ammonites from 

 the Cephalopoda-bed, now placed before the Society, to the inspec- 

 tion of M. Saemann, the well-known palaeontologist of Paris, who 

 pronounced them to be the species to which they are referred in this 

 paper ; and I afterwards made an excursion to Frocester Hill with 

 M. Saemann, who was anxious to see a section that had yielded so 

 many Upper Lias Ammonites, which at that time were not known 

 to have been found in England. 



During last summer I accompanied Dr. Oppel, of Stuttgart, to 

 Frocester Hill for the purpose of examining the Cephalopoda-bed 

 in situ. This gentleman, who is well acquainted with the Oolitic 

 formations of France and Germany, was clearly of opinion that it 

 belonged to the Upper Lias, and that it was a good representative 

 of a rock of the same age, " die harten Steinmergel voll Ammonites 

 Jurensis, insiffnis, radians, Germanii (^kircinus)," which he had de- 

 scribed in his memoir J. 



In September last I visited Scarborough and Whitby, and was 

 fortunate to find in the museums of those towns, and in the collection 

 of my friend Mr. Leckenby, several Ammonites from the Upper Lias 

 of Whitby identical with those collected from the bed at Frocester, 

 as Ammonites opalinus, Rein., A, variabilis, d'Oyb., and A. stria- 

 tulus, Sow. These facts removed all further doubts from my mind, 

 and convinced me that the Cephalopoda-bed and its underlying sands 

 belong to the uppermost part of the Superior Lias, and not to the 

 Inferior Oolite as formerly supposed. 



Section at Leckkampton Hill. — As the magnificent section of the 

 Inferior Oolite at Leckhampton Hill, near Cheltenham, has been 

 already described in detail in the pages of the Geological Society's 

 Journal §, it vdll be unnecessary now to do more than to enumerate 

 the upper beds of that section, and briefly to mention the lower strata 

 which are in more immediate relation with the Upper Liassic sands. 

 The following section has been kindly drawn by my friend Mr. E. 

 Hull, F.G.S., and exhibits very accurately the difi*erent beds here so 

 admirably exposed. 



* Quart. Journ. Geol. Soc. vol. vi. p. 208. f Op. cit. p. 210. 



X Der mittlere Lias Schwabens, p. 3. § vol. vi. p. 239. 



