2 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. QL 



expedition has made available an adequate amount of material from 

 this region. 



In the preliminary studies, a considerable number of new forms 

 have been found, and these are here described with illustrations of 

 the holotypes, and occasionally of other specimens to make the species 

 more adequately known. 



REOPHAX TRILATERALIS, n. sp. 



Plate I, figs. 1-4 



Test elongate, angled, with three distinct faces generally flattened, 

 and the angles prominent but somewhat rounded, sides nearly par- 

 allel, triangular in transverse section ; chambers few, indistinct ; sutures 

 indistinct ; wall very coarsely arenaceous, composed of angular frag- 

 ments rather neatly cemented, the surface only slightly roughened ; 

 aperture terminal, rounded, circular to narrowly elliptical. Length up 

 to 1.75 mm; diameter 0.70-0.90 mm. 



Holotype. — U.S.N.M. no. 26181 ; from station 13, latitude i8°3i' 

 05" N., longitude 62°02'i5"W. to latitude i8°3o'3o" N., longitude 

 66°04'o5" W., 200 to 300 fathoms. 



NOURIA JOHNSONI, n. sp. 



Plate I, figs. 5, 6 



Test somewhat longer than broad, very slightly compressed, pe- 

 riphery broadly rounded, greatest breadth somewhat below the middle, 

 base rounded or somewhat truncate, apertural end rounded, truncate ; 

 chambers comparatively few, and more or less involute, irregularly 

 biserial in the adult ; sutures very slightly depressed, strongly oblique ; 

 wall thin, composed of elongate sponge spicules arranged longitudinally 

 to the test, rather neatly cemented, occasionally with the ends project- 

 ing toward the base ; aperture fairly large, generally rounded or ellip- 

 tical. Length up to 1.50 mm; breadth 0.65-0.75 mm; thickness 0.55- 

 0.65 mm. 



Holotype. — U.S.N.AL no. 26183; from station 25, latitude i8°32' 

 15" N., longitude 66°22'io" W. to latitude i8°32'o5" N., longitude 

 66°22'io" W., 240 to 300 fathoms. 



This species somewhat resembles others of the genus known from 

 the Pacific, but is much more rounded. 



VERNEUILINA SPICULOTESTA, n. sp. 



Plate I, figs. 7, 8 



Test elongate, 2 to 2^ times as long as broad, the early portion 

 irregularly triangular in transverse section, somewhat twisted, triserial 

 throughout, although in the last-formed whorl two chambers make up 



