TROPICAL PACIFIC FORAMINIFERA OF "ALBATROSS" 53 



very slightly in size as added, the later ones slightly inflated; sutures 

 distinct, depressed, rather strongly curved, retral processes often 

 indistinct, but usually visible, especially in the later chambers; aper- 

 ture one or more openings at the base of the apertural face. Length, 

 up to 0.55 mm; breadth, 0.45 mm; thickness, 0.15 mm. 



Holotype. — Cushman Coll. No. 15674, from Vavau Anchorage, 

 Tonga Islands. 



This species is one of the commonest ones, and often occurs abun- 

 dantly. I have specimens from the t3^pe locality and from 12 fathoms, 

 Levuka, Fiji; 12 fathoms off Nairai, Fiji; 3 fathoms. Viva Anchor- 

 age, Fiji; and from off Ro tonga in 7 fathoms. This species is a 

 rather simple primitive form in which the retral processes are very 

 slightly developed. It is so abundant at some of the stations that 

 it is to be suspected that it is a characteristic Indo-Pacific species. 



Genus OZAWAIA Cushman. 1931 



Ozawaia Cushman, Contr. Cushman Lab. Foram. Res., vol. 7, p. 80, 1931. 



Genoholotype. — Ozawaia tongaensis Cushman. 



Test free, in the early stages planispiral, compressed, later uncoil- 

 ing and becoming circular in transverse section, bilaterally sym- 

 metrical; sutures marked by retral processes both in the early 

 stages and in the adult; wall calcareous, finely perforate; aperture 

 in the early stages made up of numerous pores at the base of the 

 apertural face, in the adult a series of rounded pores in the terminal 

 face in the last-formed chamber. Recent. 



OZAWAIA TONGAENSIS Cushman 



Plate 12, Figures 10-12 



Polystomella crispa Millett (not Linnaeus), Journ. Roy. Micr. Soc, 1904, p. 



603, pi. 11, fig. 2. 

 Ozawaia tongaensis Cushman, Contr. Cushman Lab. Foram. Res., vol. 7, p. 80, 



pi. 10, figs. 7-10, 1931. 



Test in the early stages close coiled, almost completely involute, 

 somewhat keeled and with a distinct boss in the umbilical region; 

 chambers distinct, inflated, in the early portion much compressed, 

 in the uncoiled portion almost circular in transverse section; sutures 

 distinct, depressed, rather strongly curved, retral processes short, 

 but numerous and distinct; aperture in the coiled portion at the 

 base of the apertural face, later becoming numerous rounded pores 

 in the terminal face of the chamber in the uncoiled portion. Length, 

 up to 0.6 mm; breadth, 0.35 mm; thickness, 0.15 mm. 



This is evidently the same species that Millett figured from the 

 Malay Archipelago in the above reference. It is very abundant at 

 Vavau Anchorage, Tonga Islands, from which station it was origi- 



