THE BERMUDA ISLANDS. 219 
32° and 32° 35’, and the meridians 64° 30! and 65° 30’. The 
principal species of corals are mentioned on page 114. 
The general form and position of the reef and its islets 
are shown on the accompanying map; and its position in the 
ocean and the depths of the seas, on Plate XI. The longer 
diameter of the elliptical area trends nearly northeast-by-east, 
ed GES 
Ve 

THE BERMUDA ISLANDS. 
and is about twenty-five miles in length, while the transverse 
diameter is about fifteen miles. In the ocean about the Ber- 
mudas, the depth descends to twenty-five hundred fathoms 
and beyond. Within seventeen English miles west of the 
Bermuda reef there is a sounding (by the-Challenger Expe- 
dition) of twenty-four hundred and fifty fathoms, giving 
a slope of 1:6:1; and fifteen miles east of the southern 
submerged (in ten fathoms) reef, one of twenty-two hun- 
dred and fifty fathoms. giving the slope 1:6. There is also 
a sounding of twenty-six hundred and thirty-two fathoms 
