Guppy Reprint 
261 
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Page 277 
PAPER No. 12. 
THE MICROZOA OF THE TERTIARY AND OTHER 
ROCKS OF TRINIDAD AND THE WEST INDIES. 
Paper published in the “Journal of the Field Naturalists’ 
Club’’ for Dec. 1893, pp. 277-290. 
On any question relating to the geology- of Trinidad the first 
reference naturally is to the Geological Report of G. P. Wall and 
J. G. Sawkins. Previous to the publication of that report in 
i860 the knowledge we possessed relative to the structure of the 
island was of the most meagre and erroneous kind. But the 
conditions of the Colony restricted so much the time and means 
at the disposal of the Surveyors that a general outline only was 
possible to them, leaving the details to be filled in by the ir- 
regular and erratic hand of the amateur. Hence the descriptions 
of the sedimentary strata of the district of Naparima contained 
in the report were more imperfect even than the natural con- 
ditions and difficulties of observation, them.selves pretty con- 
siderable, need have made them. The relations of the various 
