REPORT ON THE EORAMINIFERA. 
251 
Psammosphcera fusca is a very widely distributed type. Schulze’s specimens were 
obtained from Hougesund, on the coast of Norway, at 120 fathoms; and it has been found 
in even shallower water on our own shores, namely, off Loch Scavaig, Skye, 45 to 60 
fathoms. It nevertheless prefers the deep sea. I have note of its occurrence at ten 
Stations in the North Atlantic, at depths varying from 440 to 2750 fathoms; at seven 
Challenger Stations in the South Atlantic, 150 to 2800 fathoms; at the Antarctic Ice- 
barrier, 1675 fathoms; at one Station in the North Pacific, 185 fathoms; and at two in 
the South Pacific, 2335 fathoms, and 2375 fathoms respectively. 
This species is one of the many interesting arenaceous Foraminifera recently dis- 
covered by Dr. Rudolf Haeusler in the Jurassic formations of Switzerland. 
Sorosphcera, H. B. Brady. 
Sorosphcera, Brady [1879]. 
Test consisting of a colony of more or less independent inflated chambers, with no 
general apertures. — Only one species. 
Sorosphcera confusa, H. B. Brady (PI. XVIII. figs. 9, 10). 
Sorosphcera confusa, Brady, 1879, Quart. Journ. Micr. Sci., vol. xix. N. S., p. 28, pi. iv. 
figs. 18, 19. 
Test free, consisting of a number of inflated or spherical chambers of nearly uniform 
size, irregularly crowded together and adhering to each other by their outer surfaces. 
Walls thin, finely arenaceous in texture, with minute interstitial orifices. General 
aperture wanting. Diameter of individual chambers about -^th inch (1 mm.), of the 
entire colony, variable, sometimes ^th inch (4 '5 mm.). 
The number of specimens of Sorosphcera confusa hitherto met with has not been 
sufficient to permit of very thorough examination of the test by means of sections and 
the like, but its general features are tolerably obvious. It consists of a mass of inflated 
or globular chambers grouped together irregularly, having no connection with each other 
by distinct stoloniferous tubes, and no general apertures either to the individual chambers 
or to the collective test. The investment is thinner and less compactly built than in 
Psammosphcera, and there can be little doubt that the interstices amongst the sand- 
grains of the contiguous chamber-walls are sufficient to afford a certain amount of 
communication between the segments. The number of chambers varies from three or 
four to twenty or even more. 
The absence of any general aperture may be held to account for the irregular growth 
of the test, for it is clear that if the protoplasm exude at all points of the surface, a fresh 
