20 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. '/'J 



Genus STORTHOSPHAERA F. E. Schulze, 1875 

 Plate I, fig. 8 



Test free, irregularl}^ rounded, single chambered ; wall thick, 

 composed of fine whitish sand very loosely cemented, no visible 

 aperture. 



Genus IRIDIA Heron-Allen and Earland, 1914 



Test usually attached, consisting of a single chamber lined with 

 a chitinous, transparent membrane, the outer surface consisting of 

 sand grains or other foreign material built up in a dome-shaped test, 

 more or less hemispherical ; aperture usually wanting. 



Genus RHAPHIDOSCEWE Vaughan Jennings, 1896 



Test attached, conical, base broad extending to a point at the 

 outer end ; chamber single ; wall composed of sponge spicules arranged 

 lengthwise of the test with a cement of white calcareous amorphous 

 material ; aperture indistinct, at the outer pointed end of the test. 



Genus SACCAMMINA Carpenter, 1869 



Plate I, fig. 9 



Test typically free, sometimes attached, consisting of a single 

 chamber or of several spherical chambers with distinct apertures, 

 usually one for each chamber ; wall composed of sand grains finely 

 cemented by a yellowish or brownish cement; aperture circular, 

 usually with a short neck. 



Genus PROTEONINA Williamson, 1858 



Plate I, fig. 10 



Test free, consisting of a single undivided chamber, flask shaped 

 or fusiform with a single aperture ; wall composed of coarse sand 

 grains, mica flakes, or other foreign material ; test usually broadest 

 near the base and gradually tapering more or less evenly to the 

 apertural end ; aperture usually circular, with commonly a slight neck 

 which in some species is prominent and extended. 



Genus LAGENAMMINA Rhumbler, 191 1 



Test free, bottle shaped, with a pseudochitinous sublayer on which 

 are laid quite thickly, but roughly, small foreign bodies. The pres- 

 ence of this sublayer distinguishes this genus from Proteonina, which 

 does not have such a layer. 



