Vol. 6 3 .] 



OB 1 THE BATH-DOTTLTIXG DISTRICT. 



415 



At Midford the Upper Coral-Bed rests directly upon the Upper 

 Trigonia-Grit, but here a representative of the Dundry Freestone 

 was very clearly interposed. The lower portion of the Upper 

 Trigonia-Grit is conglomeratic, and similar in all respects to the 

 Maes-Knoll ' Conglomerate-Bed.' Imn ediately below come the 

 Midford Sands, only 5| feet thick here. They rest upon the local 

 Cephalopod-Bed, the top-portion of which is of Struckmanni hemera. 

 The Striatulum-, Lilli-, and Bifrons-Beds are clearly denned, and 

 evidence of the destruction of the Falciferum-Beds is found in por- 

 tions of specimens of Harpoceras falciferum remanies in the deposit 

 of bifrontis date. 



Mr. S. S. Bnckman, who very kindly identified the ammonites 

 and indicated the respective hemerse during which they lived — for 

 many were not found in situ — , does not recognize any of variabilis 

 date. 



Table showing the Hemera or Hemera during which the Liassic Ammonites 

 found at tlmsbury sleight xived. 



Name of Ammonite. 



Dactylioceras cf. Braunianam (d'Orbigny) .... 



cf . commtme (Sowerby) 



cf . Maquinianum (d'Orb.) 



Granimoceras aff. penestriatulum, S. Buckman 



■ — toarciense (d'Orb.) 



aff. toarciense (d'Orb.) 



Harpoceras fidciferum (Sowerby) 



Haui/ia incequa, S. Buckman 



, or near 



occideutalis (Haug) or near 



Hildoceras b ifrons ( Bruguiere) 



— — — aff. liildense (Young & Bird) 



cf. Levisoni (Simpson) 



Pseudocjrammoceras Muelleri (Denckm.) 



aff. Muelleri (Denckm.) . 



pedicum, S. Buckm 



subfallaciosum, S. Buckm 



aff. tJirasu, S. Buckm 



Hemera. 



S. 



pq 



3 R 



The lower portion of the section was most interesting in connexion 

 with Mr. Buckman's work on the age of the various Sands — the 

 Cotteswold, Midford, and Yeovil Sands. Mr. Buckman has always 

 held the opinion that they were not contemporaneous, and now, I 

 believe, it is generally admitted that he is right. But no more 

 emphatic evidence of the correctness of his assertions could be desired 

 than this section studied in connexion with that at Wotton-under- 

 Edge, and in the usually dry watercourse near ' The Springs,' in the 

 vicinity of Doynton, in the South Cotteswolds. In the first-uamed 

 the Striatulum-Beds are seen as somewhat hard ' marlstones ' over- 



Q. J. G. S. No. 252. 



2h 



