474 
THE GEOLOGIST. 
" Facing this cliff, there are some rocks which appear above the 
sands of the shore; at first the yellow sandy limestone but just dis- 
covers itself above the surface of the sand, and here it contains the 
same fossils as the escarpment itself; but further on, and distant about 
120 yards from the cliff, there rises a large wedge-shaped mass, 
named ' La roche pointue,' composed of yellow sandy limestone, and 
of white limestone containing Xummulina sjnssa and Serpula 
spirulcea. 
" Another depression, traversed by the little stream which is desig- 
nated ' Ruisseau du Moulin d'Estaigh,' again interrupts the continuity 
of the cliff. A sort of connexion between the two cliffs is kept up 
by a bluish argillaceous limestone containing many fossils,* and which 
appears here and there above the surface of the sand. * * * 
" Continuing the examination of the cliff, beds of bluish clay are 
first observed, which dip at about 45° to the S.E.; these beds are 
alternated with narrow bands of limestone of the same colour, con- 
taining Pygorhynchus sojntiamis, &c. These beds soon become 
horizontal, and retain the same position to the end of the escarpment. 
" The alternating beds of limestones are of a yellowish shade (see 
Sketch of clifif). These and the associated argillaceous beds become 
much disturbed and bent, then dip almost perpendicularly, and a 
little beyond the ophite rock, soon to be mentioned, entirely disappear 
under horizontal beds of alluvium. 
" It is precisely opposite this cliff that the large rock stands which 
is called ' La roche qui boit :' it is an enormous block, ten or eleven 
yards high, of extremely hard limestone, very white, and slightly 
saccharoid. The action of the waves has partially polished its sur- 
face ; it contains an immense quantity of altered nummulites {N'. 
spissa). The colour and the quality of this limestone, so unlike the 
rocks of the cliff, are due unquestionably to tlie influence of the 
ophite which appears about thirty-five yards south of the ' Koche qui 
boit,' under the form of a little rock, visible only at low water. This 
ophite is of a beautiful green colour, and has gained a fairly good 
polish under the action of the waves charged with sand, which beat 
against it perpetually. It is girdled at the distance of about twelve 
yards by a sort of semicircular belt of magnesian limestone, notched 
at its upper edge, blackish, and in some part red (also of a lovely 
grey), traversed by thread-like veins of sulphate of lime, hard enough 
to be partially polished. The seashore sand prevents the establish- 
ment of the connexion which exists between the ruptured beds of 
calcareous rock and the ophite." 
Here M. Delbos omits entirely to mention that the remainder of 
this escarpment, till it sinks like the previous one, beneath drifted 
sand-hills, is composed of horizontal beds of modern deposit, from 
thirty to forty feet in elevation, and rich in vegetable matter. He 
continues thus — 
" Beyond the last-mentioned interruption in the continuity of the 
* Among others, I have found here remains of a crustacean resembling a crab. 
—A. D. A. 
