TROPICAL PACIFIC FORAMINIFERA OF ALBATROSS 27 



a 



There is considerable variation in the sinuous character of the 

 chambers, but except for this variation the other characters seem to 

 be generally constant. It may be easily distinguished from either 

 of the other two arenaceous forms which are common in the region. 



QUINQUELOCULINA SEMIRETICULOSA, new species 



Plate 7, Figubes 2 a, b 



Test small, two to three times as long as broad, periphery rounded, 

 the basal end broadly rounded, the apertural end somewhat more 

 contracted; chambers distinct, slightly inflated; sutures slightly 

 depressed; wall beautifully ornamented by a somewhat reticulate 

 pattern, the main elements of which are composed of oblique costae, 

 somewhat irregularly sinuous, the depressed areas between broken 

 up by transverse ridges into a series of elongate pits ; aperture very 

 slightly produced, occasionally with a very short neck, the aperture 

 itself nearly circular with a very short, simple tooth. Length, 

 0.4—0.5 mm.; breadth, 0.2-0.25 mm.; thickness, 0.15-0.2 mm. 



Holotype. — Cushman Coll. No. 14619, from Port Lotten, Kersail, 

 Caroline Islands. 



This seems to be a very beautifully ornamented, localized species, 

 which was fairly common at the type locality but was not seen in 

 any of the other collections. 



QUINQUELOCULINA STRIATULA, new species 



Plate 7, Figures 3, 4 



Test slightly longer than broad, the periphery of the chambers 

 subacute; chambers triangular in section, distinct; sutures distinct, 

 only slightly depressed; wall ornamented with numerous very fine, 

 incised lines, slightly oblique to the periphery of the chamber, the 

 peripheral angle of the chamber usually smooth; aperture large, 

 broad, with a very slight lip, and a large, flat tooth nearly filling 

 the aperture. Length, 0.6-0.8 mm.; breadth, 0.55-0.65 mm.; thick- 

 ness, 0.35-0.4 mm. 



Holotype. — Cushman Coll. No. 14780, from Mokaujar Anchorage, 

 Fiji Islands. 



This is abundant at the type locality, and also occurs about Fiji 

 from Viva Anchorage, 3 fathoms ; off Levuka, 12 fathoms ; off Nairai, 

 12 fathoms. It is evidently widely distributed in the South Pacific, 

 as we have less abundant specimens from Rotonga, 7 fathoms; 

 Pinaki Islands; Makemo Lagoon; and Rongelap Atoll, Marshall 

 Islands. 



This is evidently the same as Miliolirui undulata of Heron- Allen 

 and Earland, not of d'Orbigny, figured in their Kerimba paper 

 91513—32 3 



