270 REPORT OF NATIONAL MUSEUM, 1897. 



walls thin, constructed of moderately tine sand, or sometimes almost 

 entirely of sponge spicules. 



Localities. North Atlantic and the Gulf of Mexico (stations 2399, 

 2400, 2234, 2570), 200 to 1,800 fathoms. 



HYPERAMMINA ELONGATA Brady. 

 (Plate 10, fig. 2.) 



Long, straight, slender, cylindrical, the inferior extremity slightly 

 inflated and closed, the oral end little if at all contracted; composed 

 either of fine sand or of broken sponge spicules firmly cemented; color 

 deep reddish brown. Differs from H. friabilis in the much smaller 

 diameter of the cylinder, the relatively greater length, and the firmer 

 walls. 



Localities. Gulf of Mexico, the North Atlantic 200 miles southeast 

 of Marthas Vineyard, and the coast of Brazil (stations 2394, 2568, 2760, 

 2352, 2355, 2399), 190 to 1,78L fathoms. 



HYPERAMMINA RAMOSA Brady. 



(Plate 11, fig. 1.) 



Test free, commencing as a globular, inflated chamber, continuing as 

 along, crooked, branching tube; walls composed of sand or of sand 

 mixed with sponge spicules; color, light brown. 



Localities. Off Cape Hatteras and in the Gulf of Mexico (stations 

 2115, 2352, 2383), 463 to 1,181 fathoms. 



HYPERAMMINA VAGANS Brady. 

 (Plate 11, fig. 2.) 



Test commences in a spherical chamber and continues as a slender 

 unbranched tube of nearly even diameter and of indefinite length ; some- 

 times partly free, but for the most part wandering over the surface of 

 fragments of shells of mollusks, or of fora miuif era, in a confused, tor- 

 tuous and aimless way, or coiled irregularly upon itself; walls thin, 

 composed of fine sand; color brown. 



Locality. Gulf of Mexico (station 2399), 196 fathoms. 



Genus MARSIPELLA. 



Test fusiform or cylindrical, with an aperture at each end; largely 

 composed of spouge-spicules, especially near the extremities. 



MARSIPELLA ELONGATA Norman. 

 (Plate 12, fig. 1.) 



Long, slender, fusiform, curved or crooked; walls thin, composed of 

 sand or sponge-spicules, or both, the middle portion of the test usually 

 having the larger proportion of sand; in some instances a layer of sand 



