64 
THE VOYAGE OE H.M.S. CHALLENGER. 
Test oval or subcylindrical ; aperture, typically, a rounded 
orifice at one end, ..... Technitella, Norman. 
Test long, cylindrical, slightly tapering ; in the form of 
a straight or curved tube open at both ends, . Bathysiphon, Sars. 
Sub-family 3. Saccammininse, — chambers nearly spherical ; walls thin, 
composed of firmly cemented sand-grains. 
Test a single globular chamber without any general aper- 
ture, the pseudopodia issuing from interstitial orifices, Psammosphcera, Schulze. 
A number of globular chambers adherent to each other, 
without distinct stoloniferous tubes, and with no 
general aperture, ..... Sorosphcera, Brady. 
One or several globular, pyriform or fusiform chambers, 
with distinct apertures. Polythalamous forms with 
or without stoloniferous connections, . . Saccammina, M. Sars. 
Sub-family 4. Rhabdam mining©, — test composed of firmly cemented sand-grains, 
often with sponge-spicules intermixed ; tubular ; straight, radiate, branched, or irregular ; 
free or adherent ; with one, two, or more apertures ; rarely segmented. 
Test elongate, tapering ; aperture at the broad end, 
Test elongated, tubular, the closed end broad and 
rounded, sometimes inflated so as to form a distinct 
chamber ; tube simple or branched, free or ad- 
herent, ...... 
Test fusiform or cylindrical, with an aperture at each 
end; largely composed of sponge-spicules, especially 
near the extremities, .... 
Test rectilinear, radiate, or irregularly branching; with 
or without a central chamber. The open ends of 
the tubes forming the apertures, 
Test very variable in form ; usually consisting of irregular 
inflated sacs, either single and presenting several 
tubulated orifices, or combined in branching series, . 
Unattached masses of fine flexible, simple or branching, 
chitino-arenaceous tubes, .... 
Test a branching, reticulated, adherent, sandy tube, 
spreading over the surface of shells or stones ; 
apertures terminal, . ... . 
Jaculella , Brady. 
Hyperammina, Brady. 
Marsipella, Norman. 
Rhabdammina, M. Sars. 
Aschemonella, Brady. 
Bhizammina, Brady. 
Sagenella, Brady. 
