86 BULLETIN: MUSEUM OF COMPARATIVE ZOÖLOGY. 
without presentation of proof by previous writers, whose conclusions, a8 
stated in the Introduction to this work, are known to have been based 
on the erroneous correlation of these beds with the Cambridge Yellow 
limestones which we know underlie the white limestones as a whole. 
That they lie entirely above the vast thicknesses of white limestone in- 
cluded in the Montpelier, Moneague, and Cobre formations is certain, 
and we have no reason to believe that any great mass of white lime- 
stones succeed them, the white limestones of the later formations being 
relatively trivial in comparative thickness. 
Tue COASTAL SERIES. — LATER PORTION. 
The Manchioneal Formation. — On the abrupt east coast of the 
island, notably at Mulatto Bay and Manchioneal, and at various locali- 
ties between those points, there is a marine formation composed of 
alternations of loose yellow marl and lumpy white limestone slightly 
resembling the May Pen beds, but differing in that it possesses in places 
well defined bedding planes and sometimes alternations of evenly bedded 
marl and impure limestones. 
Fieurn 27. Exposure of Pliocene at Mulatto River with Coral Heads. 
East of Pellew Bay are exposed 200 feet of a formation consisting of 
rotten and honeycombed white lime boulders, embedded in white marl 
which weathers exteriorly into yellow elay. Against the eroded sides of 
this is an unconformable deposit of elevated reef rock. 
At Mulatto River the road cuts through superb exposures, showing 
200 feet of beds similar to the foregoing, except that the limestone and 
marl are in persistent uniform alternations dipping strongly to the 
north. In these beds may be seen occasional heads of reef coral. About 
the middle of the section there is a ten foot stratum almost made up 
of the latter, which clearly represents old reef rock, the oldest thus far 
encountered in the ascending series of the Jamaican section. The 
accompanying figure will give an idea of these beds, 
