30 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 77 



Genus NOURIA Heron-Allen and Earland, 1914 



Test free, composed of several chambers, in a generally Poly- 

 morphina-like arrangement ; wall arenaceous or composed of sponge 

 spicules ; sutures indistinct ; aperture terminal. 



Subfamily 4. NEUSININAE 



Test arenaceous with some chitin, flattened and broad, composed of 

 many chambers, early portion coiled with the later chambers broad 

 and spreading, sides with elongate chitinous filaments. 



This subfamily containing the single species, A'citsijia agassizii 

 Goes, is different from the other arenaceous foraminifera but in its 

 general plan of structure is not unlike certain other genera. 



Genus NEUSINA Goes, 1892 



Test expanded, flat, made up of a series of very broad, low, flattened 

 chambers, early ones in complete specimens apparently coiled, later 

 ones in a broad, flat expanse of varying shape ; wall arenaceous or of 

 fine mud and sand with a chitinous network, flexible with a thread- 

 like border of chitin; apertures numerous, along the edge of the 

 chamber ; color in fresh specimens brown. 



Genus BOTELLINA, W. B. Carpenter, 1869 



Test arenaceous, cylindrical, one end rounded and more or less 

 swollen; walls of the test of firm consistence, rough, subdivided 

 irregularly by a labyrinth of sand grains cemented together at various 

 angles forming rude chamberlets which open out into a main tube or 

 chamber, which runs through nearly the whole test. 



Subfamily 5. ORBITOLININAE 



Test siliceous, imperforate, crateriform and composed of con- 

 centric annuli which are partitioned off into numerous chambers. 



Genus ORBITOLINA Lamarck 



Test conical, usually broader than high, base flattened or often con- 

 cave, chambers numerous divided into chamberlets ; a central mass of 

 chamberlets more or less compressed with the walls usually laby- 

 rinthic ; base with numerous apertures. 



