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 fish and a Kephalopod. The lat- 

 ter I identified as a Goniatites and named G. caribeus. But other 

 authorities decided that it was Amonites peruvianas described and 

 figured by Vonbuch in "Petrifactions recueillees en Amerique" 

 (page 4, fig. 5, 6, 7), and figured again by Marcou in Geology 

 of North America (page 34, PI. v., fig. 1). It was admitted to 



Page 26 



have resemblances to Hamites. Am. peruvianas has been found 

 in several places 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 clayslates 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 presented 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 Plypogene 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 



