OF THE KERGUELEN REGION OF THE GREAT SOUTHERN OCEAN. 483 



149 species confined to regions south of the tropics, added to 

 31 species which extend into other regions, make a total of 



180 exclusively deep-sea species unknown in deptlis less than 1000 fathoms ; 

 53 species occur both above and below the 1000 fathoms line, of which 

 20 species extend into shallow water under 150 fathoms (3 from the shore). 



Of the 182 genera represented, 

 19 genera are known only from these dredgings, while another genus known only from 

 regions south of the tropics extends into shallower water under 1000 fathoms. 



Combining the results of the Challenger trawlings and dredgings at these thirty- 

 seven deep-water Stations in the Southern Hemisphere, south of the southern tropic, in 

 depths greater than 1000 fathoms, there were captured— 



523 species of Metazoa, belonging to 312 genera. 



336 species are known only from these deep-water dredgings, and 



149 species extend into other regions of the ocean, viz.: 

 43 species are known from regions north of (but not within) the tropics, 

 41 species are known from regions both within and north of the tropics, 

 37 species are known from regions within (but not north of) the tropics, and 

 28 species are known from shallower water south of the tropics. 



There are 



390 exclusively deep-sea species unknown in depths less than 1000 fathoms ; 

 93 species occur both above and below the 1000 fathoms line, of which 

 39 species extend into shallow water under 150 fathoms (4 from the shore). 



Of the 312 genera represented, 



57 genera are known only from these dredgings, and other 

 3 genera are known only from regions south of the tropics, but extend into 

 shallower water under 1000 fathoms. 



At three dredgings in moderate depths (210 to 550 fathoms) in the Kerguelen 

 Region, the Challenger procured — 



68 species of Metazoa, belonging to 61 genera; there are 

 66 distinct fully-described species, of which 

 30 species are known only from these dredgings, and 

 36 species extend into other regions of the ocean, viz.: 



