94 BULLETIN : MUSEUM OF COMPARATIVE ZOOLOGY. 



probably the Cambridge and Manchioneal formations. Below this level 

 the low coast Soboruco occasionally occurs in spots, as seen between 

 Manchioneal and Hector's Eiver vvhere it stands about 20 feet above 

 the sea and tips nearly all the little points of land projecting into it. 



Figure 30. Section of Elevated Reef Rock at Moutli of Priestman River. 

 XX. Streamway of Priestnian's River. 

 d. Later Terrace of Elevated Reef Rock, 

 c. Older Terrace of Elevated Reef Rock. 

 h. Mancliioneal Beds. 

 a. Back Coast Mountains of White Limestone. 



The east end of the south coast line, between the mouth of Hector's 

 River and Bowden, was not examined, and we cannot from personal 

 knowledge say whether or not the Soboruco exists there. None was seen 

 on the south coast from Bowden to old Port Eoyal west of Kingston. 



Our traverses between Annatto Bay and Falmouth on the north side 

 were mostly through the back coast country, and did not immediately 

 approach the sea except at Port Maria, St. Ann Bay, and between St. 

 Ann Bay and Runaway Bay, but the Jamaican Reports, in the discus- 

 sions of the parishes of Metcalfe, St. Mary, and St. Ann, under the head 

 of "Coast Limestone," give good descriptions of the Soboruco at many 

 points along this stretch. 



One mile west of Port Maria a very small patch of Soboruco abuts 

 against the foot of the great bluff of Richmond beds shown on Plate 

 XXITI. Tliis old reef stands about ten feet above the sea, and is cut 

 by waves into detached islets, specimens of which are shown on Plates 

 XXX. and XXXL The material consists of coral heads, of which some 

 were over three feet in length and had to be blasted away by the road 

 builders. 



Between St. Ann Bay and Runaway Bay, nine miles to the west of 

 Port Maria, there is a narrow ribbon of coast plain abutting against a 

 back^fround of the flint-bearintr Montpelier beds. The lowest Soboruco 

 outcrops at several phices along this road, and is apparently synchro- 

 nous with the Falmouth formation described on a later page, which here 

 sometimes replaces or prrades into the roof rock. Patches of Soboruco 

 tip the points of land to the east and west of Runaway Bay (not noted 



