270 UEl'OHT OF NATIONAL MUSEUM, 1897. 



walls thill, constructed of moderately tine saiid, or sometimes almost 

 entirely of sponge spicules. 



Lomlith's. — ISTortli Atlantic and the Gulf of Mexico (stations 2399, 

 2400, 22;54, 2570), 200 to 1,800 fathoms. 



HYPERAMMINA ELONGATA Brady. 

 (Plate 10, Hg. 2.) 



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

 inflated and closed, the oral end little if at all contracted; comj)osed 

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

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

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

 walls. 



LocalitieH. — Gulf of Mexico, the North Atlantic 200 miles southeast 

 of Marthas Vineyard, and the coast of Brazil (stations 2394:, 25G8, 2760, 

 2352, 2355, 2399), 190 to 1,781 fathoms. 



HYPERAMMINA RAMOSA Brady. 

 (Plate 11, tig. 1.) 



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

 a long, 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), 103 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 foraininifera, 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), 190 fathoms. 



Genus MARSIPELLA. 



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

 composed of sponge-spicules, especially near the extremities. 



MARSIPELLA ELONGATA Norman. 

 (Plate 12, lig. 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 



