76 BULLETIN 11, UNITED STATES NATIONAL MUSEUM. 



stout costse in general parallel with the periphery of the test; aper- 

 tural angle decidedly acute. 



Length about 1 mm. 



Distribution. — This species has not previously been reported from 

 the North Pacific. The only material I have seen is from Nero 

 station 203 in 1,625 fathoms, bottom temperature 35° F., west of 

 Midway Islands. 



This is a remarkable occurrence for this species, which by its pre- 

 vious recorded distribution seems to have been taken in compara- 

 tively warm and shallow water. 



CRISTELLARIA ELEGANTISSIMA (Costa). 

 Plate 36, fig. 7. 



Robulina elegantissima Costa, Atti Accad. Pont., vol. 7, pt. 2, 1856, p. 198, pi. 19, 



fig. 4. 

 Cristellaria elegantissima Goes, Kongl. Svensk. Vet. Akad. Handl., vol. 25, 1894, 



p. 64, pi. 11, figs. 641, 642.— Bagg, Proc. U. S. Nat. Mus., vol. 34, 1908, p. 147. 



Description. — Test compressed with the earlier development close 

 coiled, later chambers elongate, taking on a tendency toward uncoiling, 

 early chambers ornamented with closely set, rather acute costse, 

 parallel to the periphery of the test, sutures indistinct, not limbate; 

 later chambers smooth, ornamentation persisting longest on the 

 periphery; peripheral border with a narrow but very distinct keel; 

 apertural angle prominent. 



Length about 1.25 mm. 



Distribution. — Bagg records this species from a single Albatross 

 station, H4508, in 495 fathoms off the Hawaiian Islands. This 

 specimen I have examined and it is here figured. 



This species differs from C. costata in the form of the test and in 

 the ornamentation which here is close set and rather acute while in 

 C. costata the costae are coarser and rounded. 



CRISTELLARIA WETHERELLII Jones, var. SUBLINEATA, new variety. 

 Plate 33, fig. 4. 



Description. — Test at first close coiled, later becoming uncoiled and 

 crozier-shaped ; curved; compressed, sutures depressed, portion of 

 chamber wall between the sutures ornamented with rows of tubercles 

 in linear rows both transversely and longitudinally, in later growth 

 tending to fuse into a raised ridge. 



Length about 5 mm. 



Type-specimen. — Cat. No. 8548, U.S.N.M., from Albatross station 

 D4900 in 139 fathoms, bottom temperature 52.9° F., off Japan. 

 This is the first occurrence of this species in the North Pacific, and 

 the form is not the typical one. 



