12 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
whole to the Miocene. They emphasized this conclusion by speaking! 
of Barrett's “determination of the Miocene age of the coralliferous sands 
and shales at the base of the great inclined limestone.” We can find in 
literature no substautiation of this alleged assertion of Barrett, and it is 
not in harmony with his sections as given by Woodward and Jones. 
These writers were no doubt misled by the superficial resemblance of the 
upper beds of the Blue Mountain Series to the Bowden conglomerates 
into considering them identical. 
Plantan Garden River 
2 T 
2 
Fısure 3. Duncan and Wall's Section of the Jamaican Sequence. 1. White 
Limestone. 2. Miocene Marls and Sands. 7. Altered Conglomerates and 
Cretaceous Rocks Mixed with Dikes. i 
In the same paper Duncan and Wall, by the figured section? repro- 
duced herewith, completely obliterated all conception of the true position 
of the Bowden formation by erroneously making it stratigraphically con- 
tinuous with the Cambridge Yellow limestone beds. In 1896 we person- 
ally restudied the section between Bath and Bowden, and found that the 
relations of the beds had been wrongly given by these writers, and that 
the Bowden beds, instead of being continuous with the Cambridge beds, 
were separated from them by all the lower White limestones as shown 
in the following section. 
Plantain Garden [Tiver 
3 7 
Wiauru 4. Correction of Duncan and Wall’s Section of the Jamaican Sequence. 
These errors, as published in the English serial literature between the ` 
dates of the official field work and the publication of the final report, 
were perpetuated by Etheridge in the Appendix of the latter work. On 
page 203, our Cambridge beds — which are so well described in the 
individual reports upon the western parishes under the heads of “Yellow 
Limestone” and “Calcareous Marls" — are correlated by him with the 
Bowden beds, and discussed with them (and perhaps other formations) 
1 Quart. Jour. Geol. Soc. London, 1865, Vol, XXI. p. 2. 2 Tbid., p. 6. 
