280 REPORT OF NATIONAL MUSEUM, 1897. 



adliereut and incomplete; or of (2) a tube closed and inflated at one 

 end, into the walls of which are built on all sides small foraminifera at 

 rather close and irregular intervals. Texture finely arenaceous; color 

 brown; aperture simple, terminal. 

 Localit If. —Gulf of Mexico (stations 2352, 2385), 463 and 730 fathoms. 



Genus HORMOSINA. 



Test consisting of a single rounded chamber, or, more usually, of 

 several chambers in a single straight or arcuate series. 



HORMOSINA GLOBULIFERA Brady. 

 (Plate 24, fig. 4.) 



Consists of a single spherical chamber, or of several chambers (two 

 to six), gradually increasing in size, and joined in a straight or slightly 

 curved series; walls thin, of fine sand, neatly built, aperture simple at 

 the end of a narrow tubular neck which terminates the final segment; 

 color varies from white to reddish brown. Section shows the globular 

 chambers, the thin walls, and the aperture leading to each successive 

 chamber. 



Localities. — Southeast of Georges Bank, and off coast of Brazil (sta- 

 tions 2530, 2570, 2700), 950 to 1,800 fathoms. 



HORMOSINA OVICULA Brady. 



(Plate 2-,, lig. 2.) 



Orbicular, oval, or pyriform segments, each having a more or less 

 prolonged tubular neck, the segments arranged in a rectilinear series. 

 Walls finely arenaceous, often rough externally with projecting sponge 

 spicules incorporated with the sand. Length, G mm. (4 inch) or less. 



Localities. — Gulf of Mexico and Atlantic ofl:" Cape Fear (stations 

 2383, 2399, 2G77), 200 to 1,200 fathoms. 



HORMOSINA CARPENTERI Brady. 

 (Plate 25, fig. 1.) 



Pear-shaped segments, usually with a prolonged neck, nearly uniform 

 in size, arranged in a curved or crooked series of indefinite length; 

 walls finely arenaceous, firmly and smoothly cemented; a])erture simple, 

 terminal ; color light brown. Section shows the thickness and structure 

 of the walls, and the form of the chambers. 



Locality.— Gulf of Mexico (stations 2382, 2383, 2385, 2398, 2400), 109 

 to 1,255 fathoms. 



Genus TROCHAMMINA. 



Test free or rarely adherent, rotaliform, nautiloid, or trochoid; more 

 or less distinctly septate. 



