AKT. 6 FOKAMINIFERA: POLYMORPHINIDAE — CUSHMAN AND OZAWA 121 



biserial series from the start; sutures not depressed, limbate, distinct; 

 wall smooth; aperture radiate. 



Ozawa examined the original specimens of P. lingulata, P. pernae- 

 formis, P. cognata, P. contorta, P. marsupium, and P. sacculum de- 

 posited in the department of geology and paleontology, Museum of 

 Natural History of Vienna, and is convinced that the difference among 

 these species is not more than the range of variation of individuals 

 of one species. 



We have no specimens like the present species. It closely resembles 

 P. charlottensis found in the Pacific, but the test is much broader, 

 consisting of elongated chambers. Polymorphina subrhombica from 

 the lower Eocene of New Jersey appears to be very close to Polymor- 

 phina lingulata, but it has straight sutures, wider chambers and a 

 more compressed test. 



Distribution. — Stache's species were from the Tertiary of New 

 Zealand. 



POLYMORPHINA SCHLUMBERGERI Cushman and Ozawa, new species 



Plate 31, figures 8 a, b 



Test compressed, fusiform in outline, rather obtuse at both ends, 

 margin even, periphery rounded; chambers compressed, elongated, 

 arranged at first in a contraclockwise, sigmoid series, later becoming 

 regularly biserial; sutures not depressed, distinct; wall smooth, 

 rather thick, polished; aperture radiate. 



Length of holotype 0.90 mm. ; breadth 0.50 mm. ; thickness 0.20 mm. 



Holotype. — (Cushman Coll. No. 11791.) From the Miocene, Aqui- 

 tanian superieur, St. Avit, near Mont de Marsan, France. 



In its arrangement of chambers it is very similar to Polymorphina 

 fornasinii, but it has a rather obtuse end, the sutures not depressed, 

 and the later chambers more elongate. 



POLYMORPHINA HOWCHINI Cushman and Ozawa, new species 



Plate 31, figures 9 a, b 



Test elongated, compressed, broadly rounded at the base, more or 

 less tapering toward the obtuse apertural end; periphery rounded; 

 chambers, much longer than broad, slightly inflated, overlapping, 

 alternating in a biserial series; sutures very little depressed, not very 

 distinct; wall thick, partly ornamented by numerous fine costae 

 better developed near the base; aperture large, radiate. 



Length of holotype 2 mm.; breadth 1.05 mm.; thickness 0.45 mm. 



Holotype. — (Cushman Coll. No. 9771.) From the Lower Pliocene, 

 McDonalds, Muddy Creek, Hamilton, Victoria, Australia. 



The present species is fairly large, and in general outline it resembles 

 Polymorphina frondiformis from the Crag of England, but it is much 



