2G8 REPORT OF NATIONAL MUSEUM, 1897. 



PSAMMOSPH^ERA 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), 279 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 others 



PSAMMOSPHiERA FUSCA, variety TESTACEA, new. 



I 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^ERA 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 0.025 mm. ( 4 J (T 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. fusea by Brady, "Report on the Forami- 

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

 forms have been found. 



Locality. — < 'oast of Brazil (station 2700), 1,019 fathoms. 



Genus SACCAMMINA. 



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

 apertures. Polythalamous forms, with or without stoloniferons connec- 

 tions between the chambers. 



