14 PEOOEEDXNGS OF THE SCIENTIFIC ASSOCIATION. 
will bo found in my paper on the Tertiary Fossils of the 
"YTestindies, printed in the Proceedings of tho Scientific 
Association, 1867, page 145. 
Owing to the nature of the cliffs at San Fernando great 
part of their face is often concealed for many years by 
earth fallen from the top, but occasionally the loose and 
disintegrated material is removed so a3 to expose the solid 
rock. This has happened lately to such an extent as to 
expose a largo series of beds of which I had never previ- 
ously been able to get a fair sight. These beds lie (in 
geological language) just above tho nucula-rock which I 
have already described at pages 4G and 82 of the Proceed- 
ings for 1866 and 1867. and also in the “ Geological Maga- 
zine,” (vol. iv, p. 497). The mineral composition of 
these beds is argillaceous, with a large proportion of cal- 
careous matter. Their color is of a light greenish- grey, 
and the effect of weathering upon the .matter is to deve- 
lope a sort of ^phoroidal concretionary structure entirely 
independent of the original bedding and lamination. This 
spheroidal structure is probably partly or wholly induced 
by meteoric action. The beds are an upward continuation 
of the nucula-bed, being similar in composition, and are 
part of the strata numbered 11 to 17 in the section given 
in my paper in the Journal of the Geological Society, vol. 
22, p. 571 ; and I propose to term them the nodosaria- 
beds. They rarely contain any molluskan remains, but 
are stored abundantly with foraminifera characteristic of 
deep water. I append a list of the forms I have been 
able to determine, including those of the asphalte bed. 
These determinations are only approximate, and the geo- 
logist will not expect from me a very exact statement of 
