66 



BULLETIN : MUSEUM OF COMPARATIVE ZOOLOGY. 



The two other holes bored in the reef, one just below the arsenal, and 

 the other opposite the custom-house and near the mouth of the river, 

 show a succession of sands, shells, and clays, but there is apparently no 



, '^^\V\\ 







Bairro do 



R EC IFr 





Siel!s 





fl* 



La,-y 



Ore, iarjj 



Fig. 34. Records and locations of borings made by Sir John Hawkshaw in tlie 



Pernambuco reef. 



regular sequence in the order of these beds, as will be seen by the accom- 

 panying cuts copied from the map forming a part of Sir John Hawkshaw's 

 report. 



