6 SMITHSONIAX MISCELLANEOUS COLLECTIONS VOL. QI 



TRILOCULINA FENIMOREI, n. sp, 



Plate 2, figs. 4, 5 



Test somewhat longer than broad, periphery truncate and keeled at 

 the angles, basal and apertural ends extended, the former into a sub- 

 acute point, the latter into a broader, expanded neck, typically showing 

 strong, transverse folds ; chambers very distinct, quadrangular in 

 transverse section, the periphery truncate or slightly concave, the 

 angles distinctly raised ; sutures fairly distinct, somewhat depressed ; 

 wall fairly smooth, matte, imperforate, calcareous ; aperture circular at 

 the end of a distinct, expanded neck. Length up to o.8o mm; breadth 

 0.35-0.40 mm ; thickness 0.25 mm. 



Holotype. — U.S.N.M. no. 26194; from station 26, latitude i8°30' 

 20" N., longitude 66°22'o5" W. to latitude i8°3o'3o" N., longitude 

 66° 23 '05" W., 33 to 40 fathoms. 



This species is peculiar in its general shape, particularly in the large, 

 expanded neck with transverse folds, and is fairly common in this 

 material. 



PYRGO JOHNSONI, n. sp. 



Plate 2, figs. 6-8 



Test short and broad, length and breadth about equal, periphery 

 very broadly rounded, in end view broadly elliptical, the base extended 

 back somewhat, forming a distinct lobe, apertural end also somewhat 

 extended ; chambers strongly inflated, distinct, only two visible in the 

 adult ; sutures distinct, depressed ; wall smooth, imperforate, calca- 

 reous ; aperture nearly circular, with a distinct, thickened lip and a 

 simple tooth somewhat expanded at the inner end and in side view 

 rising above the lip. Length 1.10-1.25 mm; breadth 0.85-1.00 mm; 

 thickness 0.80 mm. 



Holotype. — U.S.N.M. no. 26196; from station 26, latitude i8°3o' 

 20" N., longitude 66°22'o5" W. to latitude i8°3o'3o" N., longitude 

 66°23'o5" W., :^2) to 40 fathoms. 



This species is distinct in the peculiar form of the basal and aper- 

 tural ends of the adult chamber. 



PYRGO JUGOSUS, n. sp. 



Plate 2, figs. 9-11 



Test slightly longer than broad, in the adult having the middle of 

 each chamber somewhat produced into a distinct ridge, and in old-age 

 specimens usually having two supplementary ridges at either side, 

 periphery keeled, at the base somewhat serrate; chambers distinct. 



