394 



MR. S. S. BTJCKMAN ON THE BAJOCTAN [A-Ug. 1 89 5, 



deposited during the Murchisonce hemera ; certain it is that they 

 were laid down in a -post-opalini hemera. Farther northwards 

 the horizon of Terebratula fimbria — a species considered to have 

 lived during the bradfordensis hemera — is found heneath the Upper 

 Trigonia- grit. This is not far south of Stroud ; and at Mount 

 Surat, on the eastern corner of Rodborough Hill, there is the follow- 

 ing section : — 



Section I. — Mount Surat. (From Stroud, 1| miles nearly S. ; 

 from Leckhampton, 10| miles S.W. by S.) 



Feet. Inches. 

 Upper 2W- 1. Of this deposit 5 feet 2 inches are massive 

 gonia-grit. beds. Rhynch. angulata 3 feet 10 inches 



from the base of the bed; other usual 

 brachiopods in it. ' Perisphinctes ' 4 feet 

 1 inch from the base, extracted. A lati- 

 sulcate, peripherally nodate Parkinsonia, cf. 

 Garantiana — like a species known at Louse 



Hill in Dorset, extraction hopeless 6 , 9 



2. Attached to the base of the bed above, a 

 reddish-brown scale containing lamellibran- 



chiata 1£ 



Upper Free- 3. Whitish oolite, 

 stone. 



Only I mile N.W. from here is the well-known section just under 

 the ' Fort ' at Eodborough Hill. This shows a noticeable deposit 

 intervening between the Upper Trigonia-grit and the Upper Free- 

 stone. 



Section II. — Rodborough Hill, Quarry by the ' Fort' 

 (From Stroud, f mile S.) 



Upper Tri- 

 gonia-grit. 



Buckmani- 



grit 

 (assumed). 1 

 Lower Tri- 

 gonia-grit. 



ft. 



Hard, grey stone with numerous 

 examples of Terebratula globata 

 and Rhynchonella hampenen&is, 

 S. Buckm., to top of section 1 



Grey, shelly limestone, with pieces 

 of broken shells. Acanthothyris 

 spinosa (Linn.) ; Rhynch. cf. sub- 

 tetrahedra, Avicula, Limea 1 



(The parting her e is not at all m arked ; 

 there are several in the section 

 much more pronounced.) 



Light brown, slightly ironshot rag- 

 stone. Ctenostreon proboscidea, 

 Astarte (cores), Gryphcscs scarce ... 



Similar bed, somewhat irregular, with 

 lateral and vertical joints. Serpula 

 socialis (Mr. Upton) ; Lioceras cf. 

 intermedium, S. Buckman (9 inches 

 from bottom of bed, 1 foot 3 inches 

 from top of Freestone) ; Gryphcea, 

 Trichites, Pinna, polyzoa 



Mr. Upton has found Terebratula of the Buc/cma?ii-type, but always loose. 



