98 BULLETIN: MUSEUM OF COMPARATIVE ZOÖLOGY. 
This marl, in turn, is tipped at the sea by the lower Soboruco. A 
general section of the Barbican and lower rocks at this point is as 
follows." 
Feet, 
5. Coast Soboruco, made up of coral heads largely Mean- 
drina, occurring at and four feet above sea level . . 4 
(Unconformity). 
4. Coarse marl with shells and corals, irregularly indu- 
rated and cemented. Forms base of bluff . . . 6 
(Unconformity.) 
3. Barbican formation. Soboruco of coral heads, firmly 
cemented, resting unconformably upon 1. . . . 8 
2. Marly bed with many broken branch corals (reef débris) 
which generally underlies the above in this region . 4 
(Unconformity.) 
1. Richmond beds, forming the fundamental rocks upon 
which all of the above are deposited. Only partially 
vic a ue | 
Ficunz 36. The Barbican Reef at Barbican. 
a. Coast Marl. 
b. Barbican Reef. 
c. Richmond Beds. 
From Mile Post 19 to Mile Post 21} the coast topography shows 
only two of the benches, the immediate coast plain and the Barbican of 
twenty-five foot terrace, which projects out from the back coast hills. 
At twenty-one and a half miles from Port Antonio the seventy foot oT 
Hopewell reef terrace again appears as a prominent feature in the coast 
topography. 
Lucea Harbor has the shape of an elongated mule shoe and is a bight 
cut out of the land mass, here principally made up of the Richmond 
shales. The points of the harbor adjacent to the sea are tipped with 
the low coast Soboruco. 
1 In lithologic characters this agrees in the main with that given of the locality 
by Brown on page 248 of the Jamaican Reports. 
