REVIEWS AND BOOK NOTICES. 407 
forms dredged around the coast of Great Britain, far from being 
£ s , * . * 
‘boreal outliers,” as Forbes designated them, ‘are the inhabi- 
‘tants of an enormously extended zone of special thermal condi- 
| 
N V 
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i 
Dredge with Tangles attached. 
one which ‘crops out’ as it were, or rather comes within range 
of the ordinary means of observation, off the coast of Scandi- 
navia.” 
