404 Mr. H. B. Brady on some Arctic Foraminifera. 
12. Hyperammina ramosa, Brady. 
Hyperammina ramosa, Brady, 1879, Quart. Journ. Micr. Sci. vol. xix. 
n. 8. p. 39, pl. ii. figs, 14, 15. 
Smail fragments of the branching variety of Hyperammina 
occur in three of the soundings; but in only one instance is 
the primordial chamber present. Owing to the thin brittle 
nature of the shell-wall, the organism is never found entire ; 
but the tubes are usually identified without much difficulty, 
even in the absence of the primordial chamber. 
PSAMMOTODENDRON, Norman (MS8.). 
13. Psammotodendron arborescens, Norman (MS.). 
Amongst some Rhizopoda recently dredged by the Rev. A. 
M. Norman on the coast of Norway is a very remarkable 
arenaceous form growing like a little tree rooted on a piece of 
a Polyzoan. ‘The main stem and branches are of nearly even 
diameter (about 0°07 millim.), cylindrical, compactly cemented, 
nearly smooth externally, and brown in colour. The ends of 
the branches are rounded, and have an irregularly shaped 
orifice with thickened lip. Amongst the arenaceous tubes of 
various sorts which occur in many of the soundings, a few of 
the minuter specimens may be recognized as pertaining to 
this or some very similar species, though they are but small 
fragments and give but little idea of the general character and 
appearance of the organism in its living condition *. 
REOPHAX, De Montfort. 
14. Reophax difflugiformis, Brady. 
Reophax difflugiformis, Brady, 1879, Quart. Journ. Micr. Sci. vol. xix. 
n.s. p. Ol, pl. iv. fig. 3 a, 0. 
This is a common species in the far north, and has been 
found in nearly all the soundings. The specimens are of 
larger size and much rougher externally than that originally 
figured loc. cit. There appeared at first some question 
whether Reophax difflugiformis was an independent species or 
only the first chamber of 2. scorpiurus. The size of the test 
and its apparent completeness led to the conclusion that it was 
specifically distinct ; but recently the question as been set at 
rest in another way. In one of the dredgings made by Sir 
Wyville Thomson, during the ‘ Knight-Errant’ Expedition, in 
* Since the presentation of this report my friend David Robertson, 
F.G.S., has obtained a beautiful series of specimens of Psammotodendron 
arborescens in dredgings off Cumbrae, on the west coast of Scotland. 
