4 



Of the previously-known species of these nectic genera that are found in 

 Indian Seas, 



15 species, or 37 - 5 per cent, of them, are Indo- Pacific ; 



12 30 Atlantic; 



13 32'5 both Pacific and Atlantic."! 



To come now to the fauna of the slopes, to which Flalellum laciniatunt 

 and Caryophyllia coinmunis belong. This fauna includes 113 (or 61 per cent. 

 of the whole) of the named "Investigator" deep-sea species that are known 

 to occur in the depths of other seas. Of these 113 species 51 per cent, have 

 heen dredged by the " Investigator " above the 500 fathom line only, and 

 another 13 per cent., though found below 500 fathoms, also range above 

 that limit. 



Their affinities with other regions are as follows : 



(a) Thirty-three, or slightly over 29 per cent, of them, are found in the 

 "West Indies and neighbouring Atlantic coasts from 40 N. to 10 S. ; 



(b) Nineteen, or nearly 17 per cent, of them, occur including species 

 that are also common to (a) in the Atlantic approaches to the Mediterranean, 

 from Portugal and the Azores to Cape Verde and its islands ; 



(c) Nine, or nearly 8 per cent, of them, occur including species that are 

 also common to (a) and (b) off the European shores of the North Atlantic ; 



(d) Twenty-eight, or about 25 per cent, of them, occur including nine 

 species that are also common to (a) or (b) or (c) in Japanese Seas ; 



(e) Thirty-eight, or about 34 per cent, of them, occur including a con- 

 siderable number that are also common to (d) in the basins of the East Indian 

 Archipelago ; 



(f) Fourteen, or slightly over 12 per cent, of them, occur including forms 

 that are common to some of the other regions in Australasian Seas (New 

 Zealand, Kermadec Is. and Fiji) ; 



(g) Six per cent, of them are common to India and the west (Pacific) coast 

 of S. America, especially the neighbourhood of Patagonia ; 



(h) Two species only ( Ci'ibrella prcestam Sladen, and Solariella wfitudl- 

 buhtm Watson the latter also found off the Bermudas) are common to India 

 and the Crozet Islands ; 



(i) One species (Metula clathrata Ad. and Rv.) is known from the 

 Cape of Good Hope ; and 



(k) One (Callistephanus koreni Wright and Studer) from the island of 

 Ascension. 



