Mr. H. B. Brady on some Arctic Foraminifera. 403 
specimens of this species the additional chambers are often 
smaller than the primordial one, and to some extent, there- 
fore, supplementary ; in such cases the sandy investment of 
the terminal sphere is often incomplete, and shows numerous 
large openings between the sand-grains. 
PELOSINA, Brady. 
9. Pelosina variabilis, Brady. 
Pelosina variabilis, Brady, 1879, Quart. Journ. Micr. Sci. vol. xix. n.s. 
p. 30, pl. iii. figs. 1-3. 
Amongst the numerous chitino-arenaceous and muddy Rhi- 
zopod-tests found in No. 514a@ (G) are some which are com- 
posed of a thickish layer of fine homogeneous mud with a 
chitinous lining. Unfortunately all the specimens are more 
or less broken ; but the fragments are sutticiently large to leave 
no doubt that they belong to this species. 
RHABDAMMINA, M. Sars. 
10. Rhabdammina abyssorum, M. Sars. 
_ Rhabdammina abyssorum, M. Sars, 1858, Vidensk.-Selsk. Forhandl. 
1868, p. 248. 
It is impossible to identify this species with certainty ex- 
cept by the central portion of the test, as the broken arenaceous 
arms, by themselves, cannot be distinguished from similar 
portions of several allied organisms. ‘There are, however, 
two fragments that may be said, without any doubt, to belong 
to it. Lhabdammina abyssorum is very common in some 
parts of the North Atlantic; and Prof. G. O. Sars’s researches 
suggested the idea that it might be found abundantly in 
this section of the eastern Polar Sea; its rarity therefore 
is probably due to insufficient depth of water. 
HYPERAMMINA, Brady. 
11. Hyperammina elongata, Brady. 
Hyperammina elongata, Brady, 1878, Ann. & Mag. Nat. Hist. ser. 5, 
vol. i, p. 438, pl. xx. fig. 2. 
The specimens are small and rough, chiefly in fragments, 
only a few having the closed broad end entire. They closely 
resemble the examples obtained in the western Arctic seas. 
This species, or one nearly allied to it, attains a very large 
size in more southern latitudes. 
