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66 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
tion."' Lennox held that the “ White Limestone of Jamaica appears 
to have been deposited slowly and steadily in the bed of a tranquil sea, 
during the period known to geologists as the Miocene.”? Wall,’ 
through his unfortunate error of mistaking the overlying Bowden yellow 
marls for the underlying Cambridge yellow limestone, placed the whole 
of the White Limestone above the Bowden beds now known to be of 
late Oligocene (Miocene) age. Etheridge, Woodward, Jukes-Browne, 
Harrison, Duncan, and others, misled by Walls stratigraphic error, 
accepted this conclusion. Etheridge stated that the White Limestones 
were of Pliocene* or Post-Pliocene® age. Gabb,’ upon the ground that 
all the Jamaican white limestones were synchronous with tho Post- 
Pliocene coast limestone of San Domingo, wrongly correlated them 
as follows: “The Coast formation of Santo Domingo is extensively 
represented in most if not all the West Indian Islands. In Jamaica, as 
the White Limestone, it covers more than three fourths of the island 
and may be computed at 2,000 feet in thickness." " Sawkins first con- 
sidered it as Miocene, but in the end of the book it is put down as Post- 
Pliocene. Jukes-Drowne and Harrison? state: “With respect to the 
age of the [Jamaican] White Limestone the reports of the surveyors are 
inconsistent with one another; in some? it is spoken of as Mioceno, in 
others?” as Pliocene, and in the Tabular View at the end of the volume 
it is labelled * Post-Pliocene. Mr. Barrington Brown, however, to whom 
we wrote on the subject, informs us that this last reference was a mis- 
take ; that during the course of the Survey and before the fossils were 
examined there was naturally much uncertainty with respect to its age, 
but it was finally intended to class it as Pliocene, because it was found 
to rest on a fossiliferous yellow limestone which was considered by Mr. 
V Etheridge to be of Miocene age, and probably late Miocene.” The 
same writers (Jukes-Browne and Harrison), after presenting much evi- 
dence to show that those “ Yellow Limestones " of Wall and Etheridge 
— the Bowden beds — were of late Miocene age, and accepting the 
erroneous deduction tbat the latter lay beneath instead of upon the 
Jamaican Reports, p. 23. 2 Ibid., pp. 23 and 149. 
Quart. Jour. Geol, Soc., Vol. XXI. p. 67. 
Jamaican Reports, pp. 307 and 342, 
Tbid., Tabular View at end of volume. 
Geology of San Domingo, p. 110. 
Jamaican Reports, p. 307. 
Quart. Jour. Geol. Soc. London, 1892, Vol. XLVIII. pp. 219, 220. 
9 As on pp. 28 and 149, Jamaican Reports. 
10 Ibid., pp. 129-301. 
- 0 na». on. 
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