722 Proceedings of the Royal Society 
“Challenger” stations in the Pacific, viz,, Station 174, bottom 
temperature 3°'7 C. (38°*5 P.) ; 232, bottom temperature 5° C. 
(40°’4 F.) ; 236, bottom temperature 2°*8 C. (37°’2 F.) In addi- 
tion, it must be borne in mind that the variety here described might 
prove on further examination to be a new species. 
AmpMura filiformis, has not (except in the instances quoted in 
the table) been reported from depths greater than 150 fathoms, so 
that it is presumably a warm water species, 
Ophiacantha spectahilis occurs on the H orwegian coast, but has 
not been met with at depths greater than 100 fathoms. 
Ophioglypha alhida occurs in the British, Danish, and Norwegian' 
shallow waters, and has not been known to live at any depth greater 
than 500 fathoms. It is found also in the Mediterranean ; hence it 
is probably a warm water species. 
Ophioglypha aurantiaca^ in addition to the localities noted in the 
table, has only been observed off Martha’s Vineyard, North-East 
America, and at two of the “ Blake ” Stations, depths 466 and 524, 
and bottom temperature, 40° and 39° *5 F. respectively. 
Ophiothrix fragilis has been obtained at various points on the 
British and Norwegian coasts, from depths not exceeding 150 
fathoms, so that in default of precise temperature observations, 
it may be regarded as a species proper to warm rather than cold 
water. 
Gorgonoeephcdus eucnemls v»^as found by the “ Willem Barents ” 
at two localities, at both of which the temperature of the water was 
below the freezing point ; and it is also found off the coast of Green- 
land, so that obviously it has no more claim to be considered a 
warm than a cold water species. 
Ophiacantha abyssicola, occurs off the Lofoten Islands above the 
300-fathom line, which is within the warm area, as determined by 
the Norwegian North Sea explorers. It has also been dredged at 
one of the “ Blake ” Stations, E.S.E. of New York, from a depth 
of 304 fathoms. Bottom temperature, 49° *5 F. (9° ’7 C.). 
Ophiobyrsa hystricis and Ophiomyxa serpentaria, have at present 
only been found in the localities noted above. 
Ophiopus arcticus^ is known from Spitzbergen and Norway down 
to the 400 fathom line. 
Ophiactis Ballii is found in shallow water off the British and 
