112 
Bulletin 35 
260 
Page 180 
page 1 15 of the “Proceedings of the Scientific Association,’’ 
December, 1877,) supplying the missing letters in the diagram, 
showing that the Miocene Pohxystiua marls are not iuterbedded 
with the Eocene beds. 
It is a little difficult to indicate without the diagram itself 
where the missing letters ought to come, but I will try to do so. 
Setting the diagram before one, and measuring from the line 
marking the righthand margin of the plate along the line intend- 
ed to indicate the surface of the ground, it is about 45 millimetres 
to where the letter //' should have been placed. The^ should 
have been 50 to 55 millimetres from the same starting-point or 5 
to 10 millimetres to the left of h\ the latter coming under the 
word “Miocene” and the^ coming under the word “Eocene.” 
Then the ^ under the word “Eocene,” somewhat to the left of 
the middle of the diagram, .should be turned into^'. The answer 
to Mr. Jukes-Browne’s quer\4 which I have quoted, is therefore 
in the afiimative. 
A stud}’ of so much as is known of the Sanfernando Eocene 
inclines me to the belief that the lower beds of that formation 
were deposited in .shallow water, and that during the deposition 
of the succeeding beds the water was gradually deepening, until 
at the close of the Eocene period the deposits assumed an oceanic 
character. The enormous changes in the physical geography of 
the Caribean area of which we have evidence, and upon which I 
have touched in several of my papers, probably took place upon 
the close of the Eocene period and extended far into or even oc- 
cupied the whole of what we call the Miocene epoch of this area, 
which includes not only the West Indies, but some considerable 
portion of Central and South America. 
I have put together the foregoing notes in somewhat of a rough 
and imperfect manner ; but I propose, should opportunity serve, 
to draw up a more complete account of the Eocene and Miocene 
deposits referred to, with illustrations and a more extended notice 
of the organic remains. 
P. S. — To the list of Foraminifera from the Orbitoides beds must be ad- 
ded Tinoporiis baculatus, P. and J., that being the name of the organism 
described by me in the 22nd volume of the Journal of the Geological 
Society as Cisseis asterica. The list of fossils from the nodosaria beds will 
have to be largely augmented. 
