474 THE CRETACEOUS ROCKS OF BRITAIN. 
Mildenhall in the cutting south of Worlington House. A quarry 
near Worlington Heath Farm exposes the top of it, the section seen 
by myself and Mr. Hill in 1886 being : — 
feet. 
Gravelly soil and rubble.- - 4 
Hard nodular whitish chalk, full of Inoceramus mytiloides 
and Rhynchonella Cuvieri ------ 4 
Thin seam of greenish grey marl. 
Hard nodular rocky chalk, white with greenish marl 
between the lumps ------ seen for 3 
Tains hiding lower beds - .4 
The town of Mildenhall stands on the chalk of this zone, and 
hard, shelly, yellowish chalk, containing Rhynchonella Cuvieri, 
Inoceramus mytiloides and Calerites subrotundus , is exposed in 
a small pit at the eastern end of the town. 
At Lakenheath, north-east of the church, there is a large quarry 
exposing about 30 feet of hard chalk, which weathers to the peculiar 
lumpy or nodular surface characteristic of exposures in this zone. 
At the lowest level near the entrance harder, more nodular, 
shelly chalk was seen. The fossils found in this quarry were Am. 
[ Pachydiscus ] peramplus J Inoceramus mytiloides, Terebratula semi- 
ylobosa, Rhynchonella Cuvieri, and Calerites subrotundus. 
North of the Brandon Biver, which forms the boundary between 
Suffolk and Norfolk, the first section is the large chalk pit at Meth- 
wold, and the following description has been given by Mr. Hill and 
myself in the paper above mentioned : — 
feet. 
Soil, gravel and disturbed chalk -.4 
Hard lumpy chalk with two thin layers of greyish marl at 
the base - -- -- -- -- -3 
Hard yellowish nodular chalk with Rhynch. Cuvieri and 
other fossils - -- -- -- --25 
The floor of the pit is probably on the upper part of the Mel bourn 
Hock. The following fossils were found in the nodular chalk : — 
Am. [ Pachydiscus ] peramplus. 
Inoceramus mytiloides. 
Rhynchonella Cuvieri. 
Terebratula semiglobosa. 
Car diaster pygmeeus. 
Calerites subrotundus . 
Hemiaster minimus . 
The Melbourn Hock is exposed in a quarry at Whittington (see 
p. 211) whence Mr. C B. Hose obtained Am. [ Pachydiscus ] peram¬ 
plus two feet in diameter. It is seen again in the pit south of 
Barton Bendish, and in two quarries at Marham, all of which show 
the junction of the Lower and Middle Chalk, and have been 
mentioned on a previous page (see p. 212). 
What appears to be the lower part of the zone of Rhynchonella 
Cuvieri is exposed in the quarry between Hillington and Congliam ; 
this is worked in two levels, and the upper one is about 20 feet dee]) 
in hard, whitish chalk with yellowish stains, lying in thin beds and 
