DESCRIPTIVE CATALOGUE OF RECENT FORAMINIFERA. 319 



Segments arranged spirally or irregularly around the long axis; 

 rarely biserial and alternate. 



Genus POLYMORPHINA. 

 Segments bi- or tri- serial or irregularly spiral ; aperture radiate. 



POLYMORPHINA SORORIA Reuss, variety FISTULOSA. 

 (Plate 67, fig. 2.) 



Body ovate, smooth, nearly symmetrical, composed of four or five 

 elongated segments, arranged spirally. Upon the symmetrical body 

 is set a final segment, irregularly globular, rough, bearing numerous 

 slender, tubular, radiating projections with a round aperture at the end 

 of each. 



Localities. North Atlantic, off coast of Brazil, Gulf of Mexico (sta- 

 tions 2221, 2568, 2763), 671 to 1,781 fathoms. 



POLYMORPHINA COMPRESSA d'Orbigny. 

 (Plate 67, fig. 3.) 



Irregularly oval, compressed, smooth, margins rounded; composed 

 of four to eight segments arranged in two alternating series; aperture 

 terminal, radiate; sutures more or less depressed. Length, 0.8 to 1.6 

 mm. (fa to fa inch). 



Localities. Off Atlantic Coast of the Southern United States (sta- 

 tions 2312, 2313, 2415, 2416, 2614), 88 to 440 fathoms. 



POLYMORPHINA ELEGANTISIMA Parker and Jones. 

 (Plate 67, fig. 4.) 



Ovate or pyriform, compressed unequally on two sides; margins 

 rounded, surface smooth, segments long and arched, arranged bi seri- 

 ally, but the alternation inequilateral; aperture terminal, radiate. 

 Length, 1 mm. (fa inch) or less. 



POLYMORPHINA OBLONGA d'Orbigny. 

 (Plate 67, fig. 5.) 



Oval, elongate, more or less compressed, composed of about six 

 oblong, inflated segments, unsymmetrically arranged and united by 

 depressed sutures. 



Localities. Off the coast of Georgia and North Carolina (stations 

 2416, 2614), 276 and 168 fathoms. 



POLYMORPHINA COMMUNIS d'Orbigny. 

 (Plate 67, fig. 6.) 



Ovate, not compressed; visible segments three or four, oval, inflated, 

 sym metrically arranged; sutures rather indistinct, not depressed. 

 Length, 0.8 to 0.6 mm. (fa to -fa inch). 



