S. S. "Yantic, 



" Corn- 





fathoms. 



feet. 



6lo 48' 



348 = 



= 2,088 



610 37' 



810 = 



= 2,700 



Gl^ 20' 



. 1,078 = 



= 6,468 



610,04' 



. 1,232 = 



= 7,392 



610 20' 



. 1,346 = 



= 8,076 



Bland.] ^" ]SIarch 3,^ 



Within 3 miles S. W. from Saba is the Saba bank, which forms nearly 

 a parallelogram, its longest sides about 32 miles and its shortest about 20 

 miles in extent, the eastern edge fringed with a narrow ledge of living 

 coral, sand and rock, nearly 30 miles in length and varying in depth from 

 6^ to 10 fathoms. 



It is remarkable that an elevation similar to that mentioned with re- 

 ference to the Virgin and Anguilla banks (less than 40 fathoms,) would 

 unite Barbuda and Antigua, also St. Eustatius, St. Christopher and Nevis, 

 and convert the Saba bank into an Island. 



With respect to Guadeloupe, Dominica, Martinique, Sec, the following 

 particulars of soundings lately taken by the U. 

 mander Irwin, are extremely interesting : 



Between 

 Antigua and Guadeloupe, Lat. 16^ 40'. Long. 

 Guadeloupe and Dominica, '' 15^ 45'. " 

 Dominica and iMartiniqae, " lo^ 06'. *' 

 Martinque and St. Lucia, " 14^ 17'. " 



St. Lucia and St. Vincent, *' 13^ 33'. '' 



Capt. Parsons, R. N., found on a line of soundings from St. Vincent to 

 Barbados, depths of SIO, 956, 1,218 in (about) Lat. 13^ 05', Long. 

 60^ 25', 1,211, and 147 fathoms, the greatest ascertained depth being equal 

 to 7,308 feet. 



The same officer obtained the following results from soundings between 

 Barbados and Tobago, viz. : 



fathoms, feet. 

 W. Long. 59- 40'. 300 = 1,800 

 570 = 3,420 

 590 50'. 780=4,680 

 60O05'. 1,030= 6,180 

 6OO 10'. 1,060 = 6,360 

 " 6OO 25'. 500 = 3, 000 without bottom. 



I have already given the depths between Martinique and St. Lucia, that 

 Islandand St. Vincentandthelatterand Barbados. St. Vincent isseparated 

 from the northern end of the Grenada bank, on which Grenada and the Gren- 

 adines are situated, by a narrow channel, not over, Capt. Parsons remarks, 

 300 fathoms (1 ,800 feet) deep. The Grenadines consist of a chain of Islands 

 and rocks extending for 60 miles between Grenada and St. Vincent. The 

 depth found on soundings taken by the "Yantic," gave on and near to the 

 west side of St. Vincent, in about the Latitude of its northern end, 1,080 

 fathoms (6480 feet), opposite the channel to the south of St. Vincent 594 

 fathoms (3,564 feet), and along the West side, in close proximity to the 

 Grenada bank, from North to South, 880 fathoms Co,280 feet). 801 fathoms 

 (4,806 feet), 916 fathoms (5,496 feet), and 545 fathoms (3,270 feet). 



Trinidad and Tobago are on soundings (less than 100 fathoms), both 

 being in fact on the submarine slope of the South American Continent, 

 and the deeper water found by the "Yantic" between the former Island 

 and the Grenada bank, in (about) Lat. 11- 50', Long. 61^45', was 386 



N. Lat. 



130 00'. 





120 40'. 





120 30'. 





120 10'. 





110 40'. 





no 27'. 



