40 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 'j'J 



Genus SIPHOGENERINA Schlumberger, 1883 (SAGRINA of Authors, 

 not d'Orbigny) 



Plate 8, fig. 4 



Test elongate, composed at least in the microspheric form of a 

 series of chambers arranged tri- or bi-serially, followed by a later 

 uniserial development ; walls hyaline and perforate ; aperture in the 

 uniserial portion central and terminal, usually with an elongated neck 

 and flaring lip ; interior of the chamber with a tubular connection 

 running from the base of the apertural neck to the lip of the aperture 

 below ; wall smooth or ornamented by costae, pits, etc. 



Subfamily 5. RAMULININAE 



Test composed of branching tubular masses with rounded chamber- 

 like portions at irregular intervals. 



Genus RAMULINA Rupert-Jones, 1875 



Plate 8, fig. 5 



Test free, branching, consisting of more or less rounded chambers 

 connected by long stoloniferous tubes; wall hyaline. 



Genus VITREWEBBINA Chapman, 1892 



Test attached, composed of a series of rounded chambers increas- 

 ing in size as added, usually in a curved line; test finely perforate; 

 aperture a small arched opening at the base of the last-formed 

 chamber. 



Family 6. CHILOSTOMELLIDAE 



Test calcareous, conspicuously punctate, chambers usually some- 

 what inflated, irregularly coiled, the last-formed chamber in the 

 various genera making up a large portion of the last-formed volution ; 

 aperture usually a curved opening between the base of the chamber and 

 its predecessor, sometimes terminal. 



Genus CHILOSTOMELLA Reuss, 1850 

 Plate 8, fig. 6 



Test composed of a series of chambers in a coil, each chamber 

 making a half coil of 180° and embracing so that but a small part of 

 the preceding chamber is visible from the exterior ; wall smooth, finely 

 perforate, either thin and transparent or thick and opaque ; aperture 

 at the inner margin of the ventral face of the chamber curved, often 

 with a slightly upward-turned lip. 



