34 BULLETIN 71, UNITED STATES NATIONAL MUSEUM. 



Length, about 1 mm. 



Distribution. — The following are the existing records for this species 

 in the North Pacific : Honolulu coral reefs, Challenger station 260A, in 

 40 fathoms (Brady) ; "collected in the Gulf of Tokio " (Flint) ; off the 

 Hawaiian Islands, Albatross D4017, in 305 fathoms, (Bagg). 



The only material which I have had referable to this species is from 

 off the Hawaiian Islands, Nero station 2070 in 285 fathoms. 



This species, which, as described by Wiesner, is evidently different 

 from the S. nitida of d'Orbigny, seems to be a tropical one. From the 

 notes of Millett there seems to have been two distinct things in the 

 Malay material, the figured "wild-growing" forms being distinctly 

 stated by Millett to have cylindrical chambers. 



SPIROLOCULINA NUDA, new species. 

 Plate 5, fig. 5. 



Description. — Test in front view elongate, tapering toward the ends, 

 in end view with the periphery of the chambers much convex, edges 

 rounded, chambers with the inner margin slightly raised, in some 

 specimens usually smooth, the sutures very indistinct, the wall often 

 devoid of all sculpture or trace of sutures, apertural end somewhat 

 extended, forming a slender cylindrical neck ending in a broad flaring 

 lip, area at the base of the neck often concave, the sides of the chamber 

 at this point being slightly carinate, giving a channeled appearance to 

 the region; aperture small, circular, with a single bifid tooth; wall 

 white, dull. 



Length of largest adult specimen, 2 mm. 



Distribution.— Type-specimen (Cat. No. 9154, U.S.N.M.) from Nero 

 station 2070 in 285 fathoms off the Hawaiian Islands; other speci- 

 mens from Nero 2037 in 55 fathoms, Waimea Bay, Hawaiian Islands 

 and Albatross H3007 in 323 fathoms in the same general region. 



This is a peculiar species and a rather delicately lined one, the rather 

 long tapering neck with the channeling at the base being unusual 

 even in this genus. The dull white exterior, chalky in appearance, 

 with its lack of defined lines either of chambers or of ornamentation, 

 also is noteworthy. Outside the region of the Hawaiian Islands it 

 was not met with in the North Pacific material. 



SPIROLOCULINA COSTIFERA, new species. 



Plate 6, figs. 1-3. 



Description. — Test large, planospiral, chambers few in number, the 

 early ones close coiled, later ones with the tip of the apertural end 

 standing away from the previous chamber, the next chamber added 

 often not filling the gap thus made and in the adult not reaching to 

 the base of the preceding chamber, sutures indistinct; surface of the 

 test with a few longitudinal coarse costae, running the whole length 



