150 BULLETIN : MUSEUM OF COMPARATIVE ZOOLOGY. 



islands of Desirade, Petite Terre, and Marie Galante. They are sepai-ated 

 from Guadeloupe by narrow but deep channels, having a depth of more 

 than two hundred fathoms. 



The western part of Guadeloupe (Hydrographic Chart No. 363, Admi- 

 ralty Charts Nos. 885, 956) is volcanic, and rises to a height of nearly 

 rive thousand feet. Grande Terre, the eastern division of Guadeloupe, 

 is almost a level plain. A part of the northern coast of the island is 

 skirted by reefs with channels through it. A coral bank extends along 

 the southern part of the northeast coast of Grande Terre and of the 

 eastern side of Guadeloupe. 



The Saintes rise to more than one thousand feet, and are skirted 

 with patches of reefs. Marie Galante is of moderate elevation, its gen- 

 eral appearance being flat and low. It rises gradually from south to 

 north. The east and northeast coasts are dangerous, and skirted by 

 coral reefs. Desirade and Petite Terre are joined by a ten-fathom bank 

 of coral reef, the south and east sides fringed by corals. 



The French surveys of Martinique (Hydrographic Chart No. 1009, 

 Admiralty Charts Xos. 371, 956) show that the eastern face of the isl- 

 and from Point Laboussaye is bordered by a nearly continuous fringing 

 reef, following the many indentations of its shoi-es and of the small islets 

 off the coast. Outside of this, at a distance of from one to two miles 

 from the coast, extend a series of elongated coral banks, most of them 

 awash, rising from the 7 to the 10 fathom Hue, and forming a discon- 

 nected barrier reef with wide passages between them varying in depth 

 from four to fifteen fathoms, reaching from Caracoli Point on the north 

 to the Vauclin Channel on the south. Martinique rises to a height of 

 nearly four thousand feet. 



St. Eustatius (Hydrographic Chart No. 1011, Admiralty Charts Nos. 

 487, 2600) is volcanic, and rises to a height of over nineteen hun- 

 dred feet. The greater part of the eastern coast is fringed with corals ; 

 on the southeast coast coral patches are found. Saba, also volcanic, 

 rises perpendicularly more than twenty-eight hundred feet from the sea. 

 The 100 fathom line is not more than half a mile from the west side, 

 and only three cables from the west face. It is so abrupt that no corals 

 grow upon its sides. 



The eastern edge of Saba Bank (Admiralty Charts Nos. 130, 487, Hy- 

 drographic Chart No. 1002) is fringed with a narrow ledge of corals 

 nearly thirty miles in length, with six to ten fathoms of water. The 

 bank is about thirty by twenty miles. To the westward of the coral 

 reef, with the exception of a few coral patches, there are nine to ten 



