2 BULLETIN 10 4, UNITED STATES NATIONAL MUSEUM 



arenaceous material; apertures formed by the peripheral ends of the 

 arms or by openings in the peripheral wall. 



Genus ASTRORHIZA Sandahl, 1857 



Bull. 104, pt. l,pp. 7-14. 



Genus RHABDAMMINA M. Sars, 1869 



Bull. 104, pt. 1, pp. 14-22. 



Genus CRITHIONINA Goes, 1894 



Bull. 104, pt. 1, pp. 67-69. 



Family 3. RHIZAMMINIDAE 



Test consisting of a tubular chamber open at both ends; wall 

 with a chitinous lining and exterior of agglutinated foreign material, 

 arenaceous grains, sponge spicules or other foraminif era ; apertures 

 formed by the open ends of the tubes. 



Genus MARSIPELLA Norman, 1878 

 Bull. 104, pt. l,pp. 23-27. 



Genus BATHYSIPHON M. Sars, 1872 

 Bull. 104, pt. l,pp. 27-30. 



Genus RHIZAMMINA H. B. Brady, 1879 

 Bull. 104, pt. l,pp. 31,32. 



Family 4. SACCAMMINIDAE 



Test free or attached, composed typically of a single chamber or 

 occasionally with chambers of the same sort loosely united; wall 

 lined with chitin, the exterior of agglutinated material of various 

 sorts, sand grains, sponge spicules or other foraminif eral tests; aperture 

 usually single, of various shapes. 



Subfamily 1. Psammosphaerinae 

 Test without a definite aperture. 



Genus PSAMMOSPHAERA F. E. Schultze, 1875 

 Bull. 104, pt. l,pp. 33-38. 



Genus SOROSPHAERA H. B. Brady, 1879 * 



Bull. 104, pt. l,p. 39. 



Genus STORTHOSPHAERA F. E. Schultze, 1875 

 Bull. 104, pt. l,pp. 39,40. 



