TROPICAL PACIFIC FORAMINIFERA OF "ALBATROSS" 



ROBULUS UMBOSUS (Reuss) 



Plate 1, Figures 4-6; Plate 2, Figures 5a, b 



Rohulina limbosa Reuss, Sitz. Akad. Wiss. Wien, vol. 48, pt. 1, p. 55, pi. 6, 

 figs. 69 a, b, 1863 (1864). 



Test close coiled, slightly evolute, strongly biconvex in peripheral 

 view, periphery strongly keeled; chambers iisaally 6 to 8 in the adult 

 coil, those of the early portion often seen through the somewhat clear 

 umbilical region, of rather uniform shape and increasing regularly in 

 size as added, very slightly if at all inflated; sutures very distinctly 

 Umbate, slightly curved, and in general tangential in position in rela- 



Table 2. — Robulns limbosus — material examined 



U.S.N.M. 

 No. 



Num 

 her of 

 sped' 

 mens 



Alba- 

 tross 

 station 



Locality 



Depth 



Bot- 

 tom 

 tem- 

 pera- 

 ture 



Character of 

 bottom • 



Occur- 

 rence 



22099 



22100 



22093 

 22115 



22113 



22095 



22101 



22103 



22102 



22114 



22098 



22105 



22106 

 22094 



22107 



22104 

 22108 



22096 



22097 



22116 



H3812 



H3815 



H3826 

 H3828 



H3834 



H3849 



H3873 



H3876 



H3883 



H3885 



H3894 



H3901 



H3924 

 H3925 



H3928 



H3930 

 H3931 



H3954 



H3978 



H3989 



Entrance to Avatoru Pass, Rahi- 



roa Atoll, 7.5 miles S. 

 Lat. 15° 15' S., long. 147° 51' 35" 



W. 

 Lat. 14° 56' S., long. 148° 44' W.. 

 Lat. 14° 51' 20" S., long. 148° 51' 



20" W. 

 West coast of Makatea Island, 



1.3 miles E. 

 Village west side of Niau Atoll, 



1.75 miles NE. 

 Southwest point of Tahanae, 68° 



N., 4 miles E. 

 Northwest entrance of Makemo 



Lagoon, 1 mile SE. 

 Northwest pass of Raroia, 5 miles 



SE. 

 Southwest point of Takume 



Atoll, 1.5 miles NE. 

 Midway between Marutea and 



Nihiru Islands. 

 Northwest point of Marokau, 8 



miles E. 



Nukutipipi Atoll, 1 mile NW 



Nukutipipi Atoll, 68° S.. 1 mile 



E. 

 Anu Anurunga, 1 mile SE 



Anu Anuraro Atoll, H mile NW. 

 Anu Anuraro Atoll, H mile SE.. 



West end of Nomuka Island, 33° 



N., 6 miles E. 

 Wotju Island, Elmore Atoll, 6 



miles SE. 

 South Pass, Likieb, Vz mile N... 



Fath- 

 oms 

 819 



524 



711 

 624 



1,363 



491 



467 

 1,385 



572 



1,135 



1,020 



649 

 736 



659 



438 

 405 



35.7 

 38.7 

 36.0 

 35.6 

 39.0 



38.5 



40.7 

 42.5 



39.2 



36.5 



42.6 



wh. CO. s. glob. oz. 



vol. part, 

 wh. CO. s. brk. sh. 



wh. pter. oz 



wh. CO. s 



wh. CO. s. mang. 



nod. 

 CO. s. pter. oz 



glob. oz. mang 



wh. CO. s 



gy. yl. glob. oz. 



mang. part, 

 ers. CO. s 



glob, oz 



glob. oz. mang 



CO. s. brk. sh 



do.... _. 



CO. s. brk. sh. pter. 



oz. 



CO. s 



CO. s. pter. oz. 



mang. part. 

 CO. s. pum. pter. 



oz. 

 CO. s 



crs. CO. s 



Rare. 



Do. 



Do. 

 Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 

 Do. 



Do. 



Do. 

 Do. 



Do. 



Do. 



Do. 



• Key to abbreviations is given in Table 1. 



tion to the earlier central portion; wall smooth, finely perforate, 

 translucent or in parts almost transparent; aperture radiate at the 



