TROPICAL PACIFIC FORAMLNIFERA OF "ALBATROSS" 51 



This is apparently a cosmopolitan species in warm and relatively 

 shallow waters. It is distinguished easily by its coarsely punctate 

 wall and equally biconvex test with supplementary apertural slits 

 along, but just to one side of, the periphery. The major aperture is a 

 small arched opening at the base of the apertural face, rimmed at the 

 top by a conspicuous lip. The supplementary slits along the periph- 

 ery are inconspicuous and the earlier ones are progressively more 

 sealed over, leaving only the one on the final chamber fully open. 



In the present collections this species is fairly well represented in 

 the samples from near the islands and atolls but less so in the deeper 

 samples. 



Genus LATICARININA Galloway and Wissler, 1927 



LATICARININA PAUPERATA (Parker and Jones) 



Plate 21, Figure 6 



Laticarinina pauperata (Parker and Jones). — Cushman and Todd, 1941, Contr. 

 Cushman Lab. Foram. Res., vol. 17, pt. 4, pp. 103-105, pi. 24, figs. 10-12; 

 1942, vol. IS, pt. 1, p. 15, pi. 4, figs. 1-6. 



Rare and small examples of this species are found in a few samples 

 of the present collections. The species is probably a cosmopolitan 

 one in deep waters. 



Genus PLANULINA d'Orbigny, 1826 



PLANULINA WUELLERSTORFI (Schwager) 



Plate 23, Figures 3-5 



Anomalina wullerstorfi Schwager, 1866, Novara-'Exped., Geol. Theil, vol. 2, p- 



258, pi. 7, figs. 105, 107. 

 Truncatulina wuellersiorfi Schwager, sp. — Brady, 1884, Rep. Voy. Challenger, 



Zoology, vol. 9, p. 662, pi. 93, figs. 8, 9. 

 Planulina wuellerstorfi (Schwager). — Cushman, 1929, Contr. Cushman Lab. 



Foram. Res., vol. 5, pt. 4, p. 104, pi. 15, figs. 1, 2. 



This well-known and widely distributed species is fairly well repre- 

 sented in the present collections. As interpreted here it includes some 

 smaller-than-average specimens that are regarded as juveniles but 

 that ultimately may prove to belong elsewhere (pi. 23, figs. 3, 4). 



In typical form the species is more or less plano-convex. The flat 

 side is partially but not completely e volute and is more coarsely porous 

 than the other side. The convex side is involute and the center of the 

 cone or dome is occupied by a solid plug of shell material that forms 

 the greatest thickness of the test. The number of chambers per final 

 whorl is about 10 in the typical specimens and about 14 in the smaller 

 (juvenile) ones. In all specimens the chambers are strongly 

 curved backward, especially at their outer ends, and the sutures are 

 heavily limbate. The aperture is inconspicuous but in the typical 



