APPENDIX I. 
The following Extracts from a Letter to Professor Buck land from 
Dr. Nugent, in reply to some questions on the subject of the pre- 
ceding paper are here subjoined , as they throw further light on the 
author s views of the structure of this Island . 
“ LET the four formations constituting the Island of Antigua be 
thus designated : — Let No. 1 be the mountain trap range ; 2, the 
stratified conglomerate ; 8, beds of chert ; 4, marl, or calcareous 
beds ; and you have, I presume, the map before you. From Five 
Island division (say the point called Ship stern! to the entrance of 
Falmouth Harbour, the land is mountainous ; and highest at the 
places marked Boggy’s-hill and Biffin’s, by conjecture 1400 feet 
above the level of the sea. It is composed of masses of trap breccia, 
wacke porphyry, greenstone, &c. (the latter in some places pure, 
but generally a ferruginous shivery greenstone) which are all 
imbedded or lie included, in the same, or a similar clay matrix with 
brownish decomposing chlorite baldoge (griinerde), as I describe to 
be the matrix of the succeeding beds, or many of them. No. 2 ; 
this matrix is more redundant towards Five-Island Harbour, and 
the trap masses bear a smaller proportion to it in that quarter than 
is the case near Falmouth Harbour. You will observe that this 
matrix in this range presents no appearance of stratification, except 
the partial one at the Hermitage (Fullidelph’s Bay) ; there is no 
petrified wood, coralline chert, or trace of any organized substances 
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