REPORT ON THE EORAMINIFERA. 
235 
and except for a single example found in one of the “ Porcupine ” dredgings in the 
North Atlantic, 630 fathoms, this is the only locality at which the variety has been 
collected. 
Pelosina, H. B. Brady. 
Pelosina, Brady [1879], Biitschli. 
Test free, typically monothalamous ; rounded, cylindrical, tapering, or irregularly 
fusiform ; walls composed of a layer of soft mud with a chitinous lining. Aperture single, 
terminal. 
The organisms included in the genus Pelosina are amongst the simplest of all 
arenaceous Rhizopods. They take the form, for the most part, of a single undivided 
chamber with one terminal orifice. The test consists primarily of a chitinous envelope, 
which is strengthened and protected by an even and tolerably compact layer of mud. 
No selective power appears to be exercised with respect to the extraneous materials 
employed in its construction, and there is a comparative absence of any kind of cement 
or other incorporating medium ; hence the test is soft and crumbling, especially when 
dried, and the requisite strength is obtained by increased thickness. 
The genus has a wide distribution and an extensive bathymetrical range. 
Pelosina variabilis, H. B. Brady (PI. XXVI. figs. 7-9). 
Pelosina variabilis, Brady, 1879, Quart. Journ. Micr. Sci., vol. xix. N. S., p. 30, pi. iii. figs. 1-3. 
Test consisting of a single chamber, or of two or three independent chambers 
irregularly associated. Chambers asymmetrical, variable in shape, generally rounded, 
elongate, and tapering. Walls thick, composed of fine mud, deposited on a chitinous 
envelope which is usually extended at the oral end so as to form a membranous, tubular 
neck. Aperture terminal. Length of the individual chambers, sometimes § inch (18 or 
20 mm.), including the neck. 
The typical form of the test of Pelosina variabilis is elongate and subcylindrical, 
rounded at the base and gradually narrowing towards the superior extremity, which is 
drawn out into a slender tube. The walls are very thick in the broader portion, but 
become thinner towards the narrow or apertural end, where they consist of little more 
than a chitinous membrane, so thin and soft that it collapses on drying. The chambers 
are seldom quite symmetrical, and they often assume twisted and otherwise irregular shapes. 
Occasionally two or three such chambers are found adhering to each other, but the 
attachment is superficial and there is no stoloniferous connection between them, and each 
