328 Geolotjical Society. 



Tlie Scissum Beds are 6 feet 2 inches thick at Broatl Windsor, 

 and very fossiliferous. They retain the characters exhibited at 

 Broadwindsor in the area south of the L. & S.W. Railway; 

 but at Xorth Perrott — on the north — what appears to be the 

 equivalent of their lowest portion is softer and thicker. The 

 Scissum Beds also fail between East Chinnock and the Junction. 



The Scissum Beds are succeeded by the Ancoliocevas Beds — at 

 the Conegar-Hill Section, Broadwindsor, two strata, each 1 foot 

 thick. The Ancolioceras Beds extend into the Crewkei'ne district : 

 they are well exposed at the Misterton Lime- Works and at other 

 sections in the neighbourhood, and apparently were proved in the 

 now filled-up quarry in Haselbury-Plucknett village. Probably the 

 Ancolioceras Beds persist throughout the Crewkerne district. 



The upper portion of the March isonce Beds is the main horizon 

 for Zeilleria anglica (Oppel). In the neighbourhood of Bea- 

 rainster specimens of this brachiopod are very abundant. The true 

 ZeiJleria-anglica Beds are absent from the Conegar-Hill Section, 

 but occur at Drimpton— in the extreme south of the Crewkerne 

 disti-ict ; and apparently were met with a't Haselbury Plucknett — 

 east of Crewkerne. 



Attached here and there to the top of the MurcJii son ce- Anco- 

 lioceras Beds is ironshot rock, doubtless of late hradfordensis 

 date — the date of the Uliynclionella-ringens Beds of the Sher- 

 borne district. Thicker deposits maj- be present at Dinnington 

 and Haselbiuy Plucknett. Deposits of concavi, discitce, and, 

 in places, of hlagdeni hemerae may also be present in the neigh- 

 boui'hood of Dinnington. 



There is thus a great hiatus in the Inferior- Oolite Series of the 

 Crewkerne district, there being — except possibly in the neighbour- 

 hood of Dinnington — no rock present assignable to any hemera 

 between those of Iradfordensis and garantiancB — the latter the 

 date of the wide-spreading Upper Trigonia Critof the Cotteswolds. 



The rock of garantianae date varies considerably in lithic 

 characters, thickness, and abundance of organic remains in the 

 district. 



It has not been possible to identify definitely the Truellei Bed 

 in the district. The main of the Top Limestones is of scliloenhaclii 

 date. The >S'c7/7ff'«i(7 (?//?" Beds 'attenuate' east of Crewkerne ; but 

 at Haselbm-y-Mill QuaiTv, in wliat the Author regards as their lower 

 portion, is a veiy interesting Sponge-Bed, similar in appearance to 

 that exposed in the Peashill Quarry, Shipton Gorge (Dorset). 

 This Sponge-Bed is rich in microscopic organisms. The Zigzag 

 Bed (very similar to its equivalent in the Bui-ton-Bradstock — 

 Beaminster-Broadwindsor District) has been observed at North 

 Perrott and Haselbury-Mill QuaiTy. 



The Scroff (fuscce hemera) was apparently observed by J. F. 

 Walker in a quarry near ]\Iisterton Church. Fullers' Earth Clay 

 succeeds the Scroff. 



