726 
Proceedings of the Boijal Society 
Amphium Holhdlli^ DS., L. 
^]OpTdacanfha Indentata^ DS., L., H, 
Ophiocoma nigra, H, 
^ ^ Ophioden sericeum, DS., L., H, 
Ophioglypha, lacertosa, H. 
5, nodosa, L. 
,j Tohusta, PS., L., H. 
t „ Sarsii, DS., D, H, 
„ Stimitzii, DS,, L, 
^ ] Oxjhiopholis aculeata, DS,, L,, H, 
OplimgAeura ardica, DS., D., D, 
„ borealis, Da, 
\Opliiopus arcticus, L, 
^Ophioscolex glacioMs, L,, H, 
* Found in the w^rm 9.res. f Found in the cold g,rea, *t Found in both 
areas, 
D = Duncan, Ann. mid Mag. Nat. Hist., ser, 5, vol. it, p. 266, 1877. 
Dg. = Danielsen, Nyt Magazmfor Naturvid., p. 33, 1877. 
DS = Duncan and Sladen, A Memoir of the Echin. of the Arctic Sea, Lon- 
don, 1881. 
L=^Liitkep, ‘^Additamenta ad Historiam Ophiuroidarura,” Vidensk. Selsk. 
Skrif, Bd, V, p. 28, 1858, and in Arctic Manual, 1875. 
H = Hoffmann, ^‘Die Echiiiodermen gesammelt wahrend der Fahrten des 
^Willem Barents,’” Niederldnd, Archivf, Zool., Snppl. .■Bd, i. Lief, 3, 
1882, 
From wliicli list it appears that six of the northern Ophiiiroids 
are found also in the cold area, whilst only four occur also in the 
warm ; or, excluding the three species which are eommon to the 
two areas, we have three species common to the northern seas and 
the cold area, and only one common to these and the warm area ; in 
addition to which it must he remembered, that of the six species 
above enumerated as -‘peculiar to the cold area,” two {Opliiohyrsa 
hystrieis and Ophiomyxa serpentaria) have been found in that 
locality alone, and so are not available for purposes of comparison, 
while of the remaining four three form part of the northern fauna ; 
all these facts show, as elearly as can he expected from such small 
numbers, how much more closely this fauna resembles that of the 
cold than that of the warm area, 
