586 



PROCEEDINGS OF THE AMERICAN ACADEMY. 



458. 64° 50' 36" W. ; 32° 1 5' 5 1" N. 



459. 64° 49' 50" W.; 32° 17' 36" N. 



460. 64° 52' 28" W. ; 32° 1 5' 25" N. 



461. 64° 52' 20" W. ; 32° 15' 20" N. 

 463. 64° 47' 25" W. ; 32° 16' 23" N. 



466. 64° 49' 20" W. ; 32° 16' 55" N. 



467. 64° 38' 48" W.; 32° 20' 37" N. 



468. 64° 38' 40" W. ; 32° 20' 34" N. 

 470. 64° 43' 20" W.; 32° 19' 35" N. 



Hogfish Cut. 



Off St. Catherine's Point. 



Off St. Catherine's Point. 



Off St. Catherine's Point. 



Off St. Catherine's Point. 



lijgg's Cut. 



Town Cut. 



Nonsuch Scaur. 



Nonsuch Scaur. 



North Side of Castle Harbor. 



Between Burt Island and Dar- 



rell Island. 

 Between Tucker's Island and 



Morgan's Island. 

 North of Great Sound. 

 Near Hogfish Cut. 

 Near Hogfish Cut, 

 Near Godet's Passage. 

 Between Hawkin's Island and 



Lambda Island. 

 Long Bay, Cooper's Island. 

 Long Bay, Cooper's Island. 

 Harrington Sound. 



The Challenger Bank. 



The Challenger Bank lies southwest of the Bermuda Bank, from which 

 it is separated by a channel nine miles broad, and one thousand fathoms 

 deep at its deepest part. Thus it forms a fairly independent elevation 

 of the sea floor. If we take the one-hundred-fathom line as its margin, 

 it is seven miles long (north and south) by six miles broad, covering an 

 area of about forty square miles, and is roughly oval in outline. In its 

 shoalest spot it rises to within twenty-four fathoms of the surface, but 

 over most of its area the depth is between thirty and forty fathoms. Be- 

 tween the Bermuda and Challenger banks a single sounding of one thou- 

 sand fathoms has been made (Agassiz, '95, PI. II, fig. 1), and between the 

 latter and the Argus Bank, which lies eight miles to the south, one of 

 five hundred and thirty fathoms. One and one half miles northwest 

 of the one-hundred-fathom line of the Challenger Bank, the depth is 

 given on the admiralty chart as twelve hundred and fifty fathoms, a slope 



