STRATIGRAPHY OF THE CRAG. 85 



di fferent fauna from that of other localities referred to this zone. Lagenas are fairly 

 plentiful, the species Lagena lacunata and L. melo, which are not often met with 

 in other exposures of Coralline Crag, being rather common. Other forms of 

 Foraminifera are somewhat rare, with the exception of those species which range 

 through the entire formation. 



5. Sutton. — Zones e, f, and g. 



The pits in this classical locality, well known to all students of the Coralline 

 Crag, are now somewhat obscured, weathered, and overgrown. The celebrated 

 Bullock-yard pit, about 250 yards south-west of Pettistree Hall, furnished the 

 late Mr. S. V. Wood with the bulk of his extensive collection of* Mollusca from 

 this formation. On visiting the locality in August, 1894, a comparatively fresh 

 exposure of the Crag was visible in the outlier, at some forty to fifty yards to the 

 north of the Bullock-yard pit, and facing Pettistree Hall; it shows the following 

 section : 



Surface soil, dark purple-brown . . . . . 2' 0" 



fHard, ferruginous, false-bedded Coralline Crag; full of Bryozoa and shells, 

 Zone tt.{ , , , „ , „ 



& I many broken ...... 2'0"to3'0' 



rBuff sandy Crag; full of small shells, Scala, Bitllinella, Adeorbis, Ringieula, 



1 Chlamys, &c. . . . . . .5' 0" 



„ e. Buff-coloured marly Crag ; very few shells, in scattered bands . . 4' 6" 



The Bullock-yard section shows the same sequence, but the zone e is 7 feet 

 deep. In the sections published by Prof. Prestwich the bed e showed 4 feet, 

 and bed g 11 feet. It would thus seem that the beds are lenticular and unevenly 

 bedded. 



The zone g is far too ferruginous to form a promising field of research for 

 Foraminifera, and attention was therefore chiefly directed to zones e and f, which 

 have yielded us a rich Foraminifera! fauna ; but many of the forms recorded in 

 the First Part of this Monograph have not been found, although they were then 

 stated to be of common occurrence at Sutton. On this point Messrs. S. V. Wood, 

 jun., and F. W. Harmer say, 1 " At this spot, moreover [Sutton, and by 

 inference, supported by inquiries made at the locality, the Bullock-yard pit], 

 Foraminifera were once abundant, and from it Mr. Wood collected all the species 

 obtained by him from the Coralline Crag which are described in the Monograph of 

 Messrs. Jones and Parker [and Brady]. No Foraminifera, however, have been 

 found by him there for many years, although very many tons of the Crag from 

 the same spot have been sifted by him for Mollusca during that period." 



1 ' Supplement to the Crag Mollusca,' Palaeontograph. Soc, 1S92, p. iv. 



