BULLETIN : MUSEUM OF COMPARATIVE ZOOLOGY. 
In addition to the particular localities of the Cambridge beds men- 
tioned, there are many others throughout the island. Near Mooretown, 
Mt. Pleasant, and Shrewsbury, Portland Parish, are beds described by 
Barrett,’ which correspond closely with them in position, arrangement, 
and fossiliferous remains. 
On the north side of the east end in St. Mary’s and Portland parishes 
the Cambridge beds are much more calcareous than elsewhere, as seen 
in an exposure at the foot of the bluffa west of Port Antonio, where its 
characteristic fauna is found in beds of pure white limestone and calca- 
reous marl much resembling the overlying white limestones of the Mont- 
pelier formation, into which it here grades without perceptible break. 
A considerable mass of the white marl at thig locality is composed’ of 
large granular Foraminifera very like those found in the black shale of 
the Catadupa locality. This white foraminiferal marl is probably the 
same as that from near Carron Hall, St. Mary,? in which parish, near 
Guy’s Hill, the typical Cambridge fauna is found just below the flint 
beds of the Montpelier. At this locality the beds have their character- 
istic variations of color. Near Preston Falls, in the same parish, the 
lime beds of the formation grade down into the Richmond beds. In 
this parish Wall estimates the thickness of beds which we place in this 
formation described by him, together with a part of the overlying white 
limestones, under the name of the “Calcareous Marl"? to be between 
500 and 600 feet. 
In the district of St. Thomas-in-the-Valo, parish of St. Catherine, the 
Jambridge formation, with the typical Chapelton fossils, consists of yel- 
low marl and red and blue colored clays with impure lignite, and is 
about 300 feet thick. It is well displayed in the hilly district southwest 
of Guy's Hill.* Near Spring Vale, in the same parish (St. Catherine), 
south of Linstead, at the southern angle of the St. Thomas basin, the 
Cambridge beds are composed of yellow clays and sand extremely rich in . 
Ostrea and Foraminifera. In the parish of Manchester, the Cambridge 
beds occur at many places, notably at Spice Grove, Amby, Lower May- 
field, Oxford, Cowie Park, along Hector River and at Christiana, A 
good description of the beds at those localities is given under the head 
of “ Yellow Limestone” by Brown.5 The following section of these beds 
on Hector River is by him: — 
* Jamaican Reports, p. 84, 2 Ibid., p. 129. 
2 Ibid., pp. 129, 180. : 
4 Ibid., p. 139. Described under name of “ Calcareous Marl." 
5 Ibid., pp. 169-171. 
