710 
Proceedings of the Royal Society 
means a common form, alone requires notice — tlie specimens 
being not only plentiful but unusually fine. 
E. “Station 8. — August 17; lat. 60° 3' 1ST., long. 5° 51' W. ; 
depth, 540 fathoms; bottom temperature, 29 *2° Fahr. ; sur- 
face temperature, 56 *5°. ” 
Muddy sand. Of arenaceous Rhizopoda, Reophax sabu- 
losa and R. scorpiurus are the most remarkable. The former 
is a large rare species, only previously known by specimens 
from one of the “ Porcupine ” stations. The latter is cos- 
mopolitan, but in this particular dredging is particularly 
abundant. Of the calcareous types, Cornuspira claims 
attention from the gigantic size of some of the specimens, 
and Lagena from the long list of species found ; Pullenia 
sphceroides and Cassididina laevigata are also prominent 
forms. A large proportion of the Globigerince are of the 
small northern thick-shelled variety. 
Detailed lists of the Eoraminifera from the several localities 
are furnished in the following table. It will be seen from the 
temperatures recorded in the foregoing summary that the columns 
headed A, C, and D represent the Rhizopod-fauna of a warm sea- 
bottom, B and E of a cold area. 
A comparison of the Rhizopod-fauna of the cold sea-bottom, repre- 
sented by column E, with that of the warmer area typified by C 
and D, suggests some interesting facts in connection with the dis- 
tribution of species. The larger arenaceous types pertaining to the 
family Astrorliizidce, such as Astrorhiza, Saccammina , Storthosphcera , 
Rhabdammina, Jaculella, Marsipella, and Hyperammina, are for 
the most part conspicuously absent from the colder portion of the 
channel, and appear to be partially replaced by the weaker forms of 
Lituolidce. The genus Bidimina in its typical condition affects the 
warm area ; whilst in the cold, the starved transition varieties which 
constitute the sub-genera Bolivina and Virgidina abound. The 
genus Lagena is represented in the cold region by a list of fifteen 
species ; in the warm by only eight. The little thick-shelled Globi- 
gerina borealis , so far as we know, is confined to the cold area, and, 
as has been stated, the gigantic Cornuspira striolata is similarly 
limited in distribution. How far these facts may indicate general 
laws can only be determined by further investigation,, and on the com- 
parison of a larger series of soundings than are at present available. 
