288 REPORT OF NATIONAL MUSEUM, 1897. 



GAUDRYINA RUGOSA d'Orbigny. 

 (Plate 33, fig. 3.) 



Elongate, triangular iu section, the angles acute, triserial portion very 

 short, biserial chiimbers alternately triangular and broadly quadri- 

 lateral iu transverse section; structure coarsely arenaceous, compact. 

 Length, 2 to 3 mm. {-^K- to ^ inch). One specimen in the collection 

 measures 4.5 mm. ( i% inch). 



Localities. — South of Marthas Vineyard and Gulf of Mexico (stations 

 2243, 2400), 03 and 109 fathoms. 



GAUDRYINA SCABRA Brady. 



(Plate 34, fig. 1.) 



Resembles G. pupoides in form, but is larger, brown in color, coarsely 

 arenaceous iu texture, tbe sand sometimes mixed witb spouge spicules; 

 aperture a depressed slit at the inner margin of the last segment. 

 Length, about 1.5 mm. {--pg inch). 



Localities. — Gulf of Mexico and west coast of Patagonia (stations 

 2352, 2385, 2784), 194 to 730 fathoms. 



GAUDRYINA SIPHONELLA Reuss. 

 (Plate 34, Hg. 2.) 



Small, elongate, subcylindrical, occasionally distorted, the biserial 

 segments numerous and somewhat iuflated; aperture at the slightly 

 projecting end of the final segment; color brown. Leugth, 0.5 to 0.8 

 mm. (Jg to tjV inch). 



Locality. — Southeast of Marthas Vineyard (station 2568), 1,781 

 fathoms. 



Genus CLAVULINA. 



Early segraeuts triserial, later ones uuiserial and rectilinear; test 

 generally either cylindrical or trifacial ; aperture valvular. 



CLAVULINA COMMUNIS d'Orbigny. 

 (Plate 34, fig. 3.) 



Much elongated, cylindrical ; the earliest portion triserial, conical, 

 pointed, the remaiuing portion uuiserial, straight, slightly depressed at 

 the sutures; color, grayish- white; surface smooth or rough according 

 as the walls are composed of fine or coarse calcareous sand; aperture 

 round, at the end of a tubular i^rojectiou from the fiual segment. Sec- 

 tions show the dimorjihous character of the test, the thickness of walls, 

 and the communication of the chambers. Length, from 2 to 5 mm. {-^j 

 to i inch). 



Localities. — North Atlantic, Gulf of Mexico, and Panama Bay (sta- 

 tions 2212, 2355, 2805), oO to 425 fathoms. 



