268 REPORT OF NATIONAL MUSEUM, 1897. 



PSAMMOSPH^RA FUSCA Shulze. 

 (Plate 8, fig. 1.) 



Nearly spherical, free or adherent, rough, constructed of compara- 

 tively large white grains of sand firmly cemented in a single layer; 

 cavity as smooth as the nature of the material will admit, but not lined 

 with cement substance, nor are the angles between the sand grains 

 smoothly filled; no general aperture; color of the cement substance 

 light grayish brown. Diameter, about 1.5 mm. (^ inch). 



Locality. Off Havana (station 2343), 270 fathoms. A variety of this 

 species, taken off the coast of South Carolina, has a test constructed 

 of coarse black sand; the cement is light brown, as in the other. 



PSAMMOSPH^RA FUSCA, variety TESTACEA, new. 

 (Plate 8, fig. 2.) 



Differs from the type principally in the composition of the walls, 

 which are constructed of a single layer of dead shells of foraminifera. 

 It is generally larger and very rough, resembling an accidental agglom- 

 eration of shells, but showing in section a smooth cavity, as in the 

 strictly arenaceous forms. 



Locality. Found only in the Gulf of Mexico (stations 2358, 2383, 

 2399), 196 to 1,181 fathoms. 



PSAMMOSPH^RA PARVA (P.. FUSCA Brady). 

 (Plate 9, fig. 1.) 



Test free or adherent; spherical when free; when adherent having a 

 smooth facet, usually with an incomplete wall on the attached side. 

 Diameter, about 0.625 mm. (^ inch); walls thin, composed of fine sand 

 firmly united, the cement substance filling in smoothly the interstices 

 and angles of the sand grains, both externally and internally; test 

 often built around a long sponge spicule, which transfixes the test, 

 both ends of the spicule protruding; color deep reddish brown. This 

 species is included with P. fusca by Brady, " Report on the Forami- 

 nifera," but the characters are quite distinct, and no intermediate 

 forms have been found. 



Locality. Coast of Brazil (station 2760), 1,019 fathoms. 



Genus SACCAMMINA. 



One or several globular, pyriform or fusiform chambers, with distinct 

 apertures. Polythalamous forms, with or without stoloniferous connec- 

 tions between the chambers. 



