324 REPORT OF NATIONAL MUSEUM, 1897. 



HASTIGERINA PELAGICA d'Orbigny. 

 (Plate 70, fig. 4.) 



Snbgrlobnlar, compressed equally on both sides, iiml)ilici depressed; 

 composed of iutiated segments rapidly increasing in size, arranged in a 

 planospiral series of about two convolutions, the last convolution 

 entirely including the others; walls thin; sutures depressed; surface 

 roughish with the stumps of broken spines; aperture a large arched 

 opening at the inner margin of the last segment. Diameter, about 

 0.8 mm. (aV inch). 



LccaUty. — Specimens exhibited are worn bottom shells collected in 

 the Gulf of Mexico (station 2377), 210 fathoms. 



Genus PULLENIA. 



Test regularly or obliquely nautiloid and involute; segments only 

 slightly ventricose; shell wall very finely perforated; aperture a long, 

 curved slit close to the line of union of the last segment with the 

 previous convolution. 



PULLENIA QUINQUELOBA Reuss. 

 (Plate 70, fig. 5.) 



Biconvex, bilaterally symmetrical, round, peripheral edge thick and 

 rounded, final convolution consisting of about five segments wholly 

 concealing the previous convolutions; surface smooth; sutures some- 

 times depressed, sometimes obscure; aperture a long, narrow, curved 

 slit at the inner margin of the last segment. Diameter, about 0.6 mm. 

 (-/o inch). 



Localities. — Widely distributed; specimens from the JSTorth Atlantic 

 (three stations) and the Gulf of Mexico (stations 2115, 2204, 2584, 2352), 

 463 to 843 fathoms. 



PULLENIA OBLIQUILOBULATA Parker and Jones. 

 (Plate 70, fig. 6.) 



Subglobular, slightly compressed, inequilateral, obliquely nautiloid; 

 surface smooth; walls thick and finely but conspicuously perforated ; 

 aperture a crescentic opening on the inner margin of the last segment, 

 generally somewhat obliquely placed. Diameter, about 0.8 mm. 

 (aV inch). 



Locality. — Off the Windward Islands, West Indies (station 2751), 

 687 fathoms. 



Genus SPH^^ROIDINA. 



Segments few, coiled so as to form a nearly globular shell; aperture 

 arched; sometimes partially closed with a valvular tongue. 



