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 ; 
LS 45; G2 oe ey ,, both Pacific and Atlantic. | 
To come now to the fauna of the slopes, to which Flabellum laciniatum 
and Caryophyllia communis belong. This fauna includes 118 (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 
been 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 (2)—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 (0) 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 §. America, especially the neighbourhood of Patagonia ; 
(h) Two species only (Cribrella prestans Sladen, and Solariella infundi- 
bulum Watson — the latter also found off the Bermudas) are common to India 
and the Crozet Islands ; 
(i) One species (Metula clathrata Ad. and Ry.) is known from the 
Cape of Good Hope; and 
(k) One (Callistephanus koreni Wright and Studer) from the island of 
Ascension. 
