288 REPORT OF NATIONAL MUSEUM, 1897 



GAUDRYINA RUGOSA d'Orbigny. 

 (Plate 33, fig. 3.) 



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

 short, biserial chambers alternately triangular and broadly quadri- 

 lateral in transverse section; structure coarsely arenaceous, compact. 

 Length, 2 to 3 mm. (-£,- to | inch). One specimen in the collection 

 measures 4.5 mm. (^ inch). 



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

 2243, 2400), 03 and 109 fathoms. 



GAUDRYINA SCABRA Brady. 

 (Plate 34, fig. 1.) 



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

 arenaceous in texture, the sand sometimes mixed with sponge spicules; 

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

 Length, about 1.5 mm. ( ^ inch). 



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

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



GAUDRYINA SIPHONELLA Reuss. 

 (Plate 34, fig. 2.) 



Small, elongate, subcylindrical, occasionally distorted, the biserial 

 segments numerous and somewhat inflated; aperture at the slightly 

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

 mm. (5V to 7 jV inch). 



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

 fathoms. 



Genus CLAVULINA. 



Early segments triserial, later ones uniserial 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 remaining portion uniserial, 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 projection from the final segment. Sec- 

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

 and the communication of the chambers. Length, from 2 to 5 mm. (^ 

 to \ inch). 



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

 tions 2212, 2355, 2805), 50 to 425 fathoms. 



