Vol. 62.] PHOSPHATIC CHALKS OF WLNTERJBOURNE AND BOXFORD. 509 



Textularim are rather more abundant, the wash-residues of this 

 chalk exactly resemble those of bed (1) in the pit (a). 

 The unearthed blocks yielded remains of: — 



Echinocorys sp. 



Marsiqrites testtidinarius, Schloth. 



Porosphcera globularis, Phil. 



Inoceramus. 

 Asteroid-ossicles. 

 Cidaris sceptrifera, Mant. 

 Cidaris sp. 



As pieces of hard, greenish-yellow chalk and a few brown 

 nodules occurred amongst the excavated material, we infer that the 

 surface of the rock here nearly coincides with the junction of the beds 

 numbered (1) and (2) in the pit (a). The south-westward dip in 

 that pit would have led one to expect much older beds at this spot. 



(c) Exposure near the south-eastern corner of 

 Lower Farm. 



This occurred, or, rather, was made, in the bottom of a plough- 

 furrow nearly midway between exposures (a) and (b), about 10 feet 

 lower than the latter. The chalk here is firm to rather soft, fine- 

 grained, and white. Under the microscope, the coarse residues are 

 seen to consist of subangular pieces of calcite, bits of flat shell 

 (probably of Ostrea), Rotaline foraminifera, and prisms of Inoceramus 

 (in relatively-small proportion), together with brown and amber- 

 coloured chips of fish-bone, teeth, and scale, and an occasional pale- 

 brown coprolite. The proportion of phosphatized material is so 

 small, that the rock can scarcely be termed a Phosphatic Chalk. 



The megascopic fossils noted are : — - 



Ostrea sp. -Asteroid-ossicles. 



Wiynchonella plicatilis, Sow. TJintacrinus. 



(d) Exposure 3 furlongs north-north-west of Lower Farm. 



This is a patch of rubble, on the site of a ploughed-out pit in 

 ordinary white chalk with seams of tabular flint. Fossils are few 

 and unimportant. From the characters of the samples examined, 

 and from evidence obtained farther west, we infer that the Chalk 

 here belongs to the highest part of the Micraster cor-anguinum-Zone. 



(e) Quarry 300 yards west of the New Inn, 

 Winterbourne. 



This is an abandoned working, in ordinary white chalk with bands 

 of solid and hollow flint-nodules. Its nearer edge is a furlong- 

 distant from, and perhaps 20 to 25 feet lower than, the exposure 

 lettered (b). The Chalk has yielded all the commoner fossils of the 

 upper part of the M. cor-anguinum-Zone for this district, and not 

 any that are distinctive of newer beds. The flint-bands are slightly 



Q. J. G. S. No. 247. 2 m 



