228 PR0CEEDIN08 OF THE NATIONAL MUSEUM. vol.42. 



species. The figured specimen is evidently only a fragment, as are 

 all the specimens seen, and the complete test must be considerably 

 larger. There is some variation in the color and texture of the wall 

 and the comparative amount of spicules, depending somewhat upon 

 the bottom conditions. All the stations are in fairly deep water 

 compared with the shore conditions under which the other two known 

 species were found. Usually specimens were very numerous, making 

 up the large mass of the dredged material at the type station. 



HALIPHYSEMA CATENULATA, new species. 



Plate 28, figs. 5, 6. 



Description. — Test elongate, tapering, with numerous constric- 

 tions as though segmented; wall arenaceous, with many included 

 fragments of sponge spicules and with a crown of elongated spicules 

 about the aperture; basal end with a sort of expanded portion like a 

 proloculum, also made up largely of broken spicules; aperture ter- 

 minal, circular, surrounded by the crown of erect spicules. 



Length about 10 mm. 



Type-specimen. — Cat. No. 8464, U.S.N.M., from Albatross station 

 D5630, south of Patiente Strait, Dutch East Indies, 569 fathoms. 

 The species was very common at this station, but was not met with 

 elsewhere in the dredgings. 



The spicules throughout the test except at the apertural tip are 

 broken fragments, but about the aperture there are elongate spicules 

 not entire but so placed that they rise up above the aperture like a 

 crown. 



MARSIPELLA GIGANTEA, new species. 

 Plate 28, figs. 1, 2. 



Description. — Test elongate, tapering, nearly straight; wall of 

 broken sponge spicules and arenaceous material, reddish-brown in 

 color, spicules for the most part placed nearly in the axis of the test, 

 occasionally projecting out from the wall; aperture circular, termi- 

 nal, at the larger end. 



Length up to 15 mm. 



Type-specimen. — Cat. No. 8465, U.S.N.M., from Albatross station 

 D5630, south of Patiente Strait, Dutch East Indies, 569 fathoms. 



This species is much larger than any laiown species of this geung 

 but has the usual characters for MarsipeUa. 



AMMOSPH^^RULINA, new genus. 



Test arenaceous, spherical, attached, with one or more intmor 

 chambers entirely inclosed, apertures interstitial. 

 Type-species. — A. adhserens, new species. 



