170 
Bulletin 35 
318 
blue limestone I obtained more distinct fossils, some of which in- 
duced me to assign a possible devonian or carboniferous age to 
that rock. There were also a fi.sh and a Kephalopod. The lat- 
ter I identified as a Qoniatites and named G. caribeus. But other 
authorities decided that it Am oiiites peruvianus de.scribed and 
figured by Vonbuch in “Petrifactions recueillees en Amerique’’ 
(page 4, fig. 5, 6, 7), and figured again by Marcou in Geolog}" 
of North America (page 34, PI. v"., fig. i). It was admitted to 
Page 26 
have resemblances to Hamitcs. Am. peruviamcs has been found 
in several jilaces in South America, including Barbacoes near 
Trujillo in Venezuela, and also in Texas, and if one were quite 
satisfied as to the identification one might have to admit a lower 
cretaceous age for the blue limestone. But that would not neces- 
sarily carry a similar age for the mica and clay.slates and associ- 
ated rocks of the Caribean group which might still be devonian 
or carboniferous, for I cannot agree with Mr. Cunningham Craig 
in his theory of a Fan structure for this series of rocks. The 
series lies on top of a ridge of hypogene rock which comes to the 
surface in Tobago and also on the north coast of Trinidad near 
Toco. The whole series was, I think, conformably deposited up- 
on this Hypogene rock and the great dislocations which occur in 
it were subsequently produced, as I have endeavoured to show in 
several papers, notably that entitled “The Growth of Trinidad.’’ 
I have taken a part in solving some of the problems pre.sented by 
West Indian geology ; but many others, including that of the 
relations of the old sedimentary rocks called by Wall the “Cari- 
bean Group’’ to the underlying Hypogene rocks yet remain to 
be worked out. 
In many papers of mine I have alluded to the dislocations 
and earth movements which have occurred in the region which 
for convenience I have called the “Caribean Region,’’ including 
the lands and islands bordering on the Caribean Sea. At the end 
of my paper on the “Growth of Trinidad’’ will be found a list of 
works on this subject, which will serve as an index to the liter- 
ature. I have, to some extent, made a .special study of these 
