388 D'ARCY W. THOMPSON, HYDROIDA. 
The interesting group of Bertularias allied to S. arctica, 
Allm., are restricted to the European end Of the freonom: 
S. albimaris, Mereschk., is a very near, and S&S. tenera, Sars, 
a scarcely more distant relative of this species. 
A Lafoöéa and-a small Campanulina appear to be new, and 
are described as L. sibirica and C. borealis. 
The collection contains altogether about 23 species, gathered 
in 17 different localities, throughout the whole northern coast 
of the old world from Barents Sea to Bering Strait. Except 
in the first few stations, to the westward of 115? E. longitude, 
all the specimens are from comparatively shallow water, not 
deeper in most cases than 15, and in one case 29, fathoms: 
This circumstance seems to have deprived us completely of 
any species of BSelaginopsis or Pericladium, such as Meresch- 
kowsky and Allman have described from the North Pacific, 
and the Willem Barents has brought home from her later 
voyages in Barents Sea. We accordingly learn nothing more 
of the remarkable distribution of these interesting forms. 
The following table shows all the species obtained, with 
their localities; and I have added other columns to indicate 
such of the species as are already known from Scandinavia, 
Barents Sea or Alaska. 
