182 
THE CRETACEOUS ROCKS OF BRITAIN. 
The “ rag-bed ” is again exposed in a quarry by the roadside south¬ 
east of Ivinglioe. The beds seen are : — 
ft. 
Greyish-white chalk, breaking along curved planes - - - 7 
Hard yellowish somewhat gritty chalk, breaking into thin 
even layers ---------- 2 
Hard grey gritty ‘‘ rag ” full of green grains and green-coated 
nodules ---------- 2£ 
Tough greyish marly chalk + seen for 6 
Fossils from the Lower Chalk of Oxfordshire and 
Buckinghamshire. 
The localities for the rock-bed in the Chalk Marl are : (1) In 
Oxfordshire, Crowmarsh, Clay Lane (west of Ewelme), Briglitwell 
Upper Town, Rumbold Lane (west of Blight well), and Pyrton, 
near Watlington ; (2) in Bucks, the railway cutting south of Ris- 
borough Station, the spring heads at Princes Risborough, Monks 
Risborough, and Ascot; (3) West End Hill, near Tring. The 
figures in this column refer to the districts as above numbered. 
The localities for Totternhoe Stone are:—For Oxfordshire (o), 
Crowmarsh ; in Bucks (/;), Winnall road-cutting, near Bledlow 
north-east of Culverton, and at Parkfield, south of Risborough; 
and Ivinghoe, near Tring (indicated separately by the letter i). 
The localities for the chalk above the Totternhoe Stone are : — 
In Oxfordshire (o), Crowmarsh; in Buckinghamshire (b), pits 
south-west of Bledlow, south-east of Saunderton, near Whiteleaf, 
south-east of Great Kimble, and at Butler’s Cross. 
The localities for the Belenmite Marls are In Oxfordshire (o) 
North Stoke ; in Bucks ( b ), Butler’s Cross. 
The fossils were obtained for the Geological Survey by Mr. J. 
Rhodes, and identified by Messrs. Sharman and Newton, except 
those from Oxfordshire, which were obtained by myself, and those 
from West End Hill, Bucks, which include some found by 
Professor Barrois (see list in his Recherches, p. 151). 
Marl 
Rock. 
Tottern¬ 
hoe Stone. 
Chalk 
above. 
Belemnite 
Marls. 
Pisces. 
Beryx. 
— 
— 
o 
— 
Corax falcatus, Ag . 
— 
— 
b 
— 
Scapanorhynchus raphiodon, Ag. - 
— 
— 
b 
•_ 
„ subulata, Ag. . 
2 
— 
— 
_ 
Protosphyrsena ferox, Leidy - - - 
— 
U — 
b 
_ 
Elasmobranch vertebra. 
_ 
_ 
_ 
b 
Fish scales . 
3 
— 
b 
b 
Cephalopoda. 
Ammonites [Acanth.] Cunningtoni, Sharpe - 
- 
— 
b 
— 
„ [Hoplites] falcatus, Mant. 
- 
1 
_ 
— 
— 
„ [Haploceras] lewesiensis, Mant. 
- 
— 
» — 
— 
b 
„ [Acanth.] Mantelli, Sow. - 
- 
1 
— 
o 
— 
,, „ navicularis, Mant. - 
- 
12 3 
— 
— 
— 
„ „ rotomagensis, d’Orb. 
- 
— 
b i 
o b 
— 
„ [Schloenb.] varians, Sow. - 
- 
12 3 
b 
— 
— 
,, „ Coupei, Brongn.- 
- 
12 3 
— 
— 
Anisoceras armatus? Sow. .... 
- 
1 
_ 
_ 
. 
Baculites baculoides, Mant. .... 
- 
3 
_ 
_ 
_ 
Turrilites costatus, Sow. .... 
- 
1 
_ 
_ 
— 
„ gravesianus, d’Orb 
- 
3 
— 
— 
-- 
„ Mantelli, Mant. .... 
- 
2 3 
_ 
_ 
—. 
„ tuberculatus, Bose. 
. 
1 2 
_ 
_ 
Actinocamax plenus, Blainv. .... 
- 
_ 
_ 
_ 
o b 
Nautilus elegans, Sow. . 
- 
1 
— 
— 
— 
„ sp.. 
8 
— 
— 
— 
