164 Scientific Intelligence. 
To the common observation that surface arctic species extend 
along the cold depths of the ocean toward the equator and the 
antarctic seas, Prof. Fuchs says that these arctic species are few 
and not t characteristic kinds; and that some are not littoral 
er but from the deep-sea as elsewher 
s speaks of the abundant life in the arctic seas not- 
pods, etc., living, between N orway and Iceland, in waters having 4 
is aga between 30°-2 and 28°°4 F.; of similar kinds, and many 
m the same in species, occurring ‘at the same depth off Scot- 
land iad Treland, in waters 43° to 48° F. in temperature; on the 
Pourtales Plateau, i in waters at 44° to 56° BF. and on the "Euplee- 
is the cause of limitation in depth, he prefaces by the remark that 
ana has already 4 Sig tedly and emphatically pointed out that 
temperature plays only a very subordinate part in the distribu- 
et Fuchs observes further that pelagic species, or those of 
the open sea, are really species of the darkness; that they com 
up to the surface as te light fades he into en and return 
2 2 of 
and on other shores; and suggests to the geologist the import 
ance of this consideration, as is also the fact that the dark sea- 
depths exist at only 50 fathoms. In this connection he states 
that the blind Isopod of the genus Ceecidotea (Asellus Borelli is 
segs here by rae and Packard), occurs in the great t depths 
ake Geneva, as well as in the American and Carniolian caves} 
od that while es! Ophidiide (near allies of the Gadidw) are the 
most abundant and characteristic kinds of de eep-sea fishes, an¢ 
several of them are blind, there is the remarkable fact that tw? 
blind Ophidiide, showin ng close resemblance to their deep-sea 
relations, occur in the caves of 
* This Journal, vol. xv, p. 2°4, 1853 , Exp. Exp. Report on Zoophytes, 
te p. 103, Report on Geology, 1849, p. wy and Report on Crustacea, 1852, P- 
