TROPICAL PACIFIC FORAMINIFERA OF "ALBATROSS" 27 



Only four small specimens were found. The species is characterized 

 by its compressed and plane, not arched, shape and the presence of 

 small knobs projecting forward from about the midpoint of each 

 dorsal suture. 



Genus BRONNIMANNIA Bermudez, 1952 



BRONNIMANNIA HALIOTIS (Heron-Allen and Earland) 



Plate 5, Figure 2 



Discorbina haliotis Heron-Allen and Earland, 1924, Journ. Roy. Micr. Soc, 



p. 173, pi. 13, figs. 99-101. 

 Bronnimannia haliotis (Heron- Allen and Earland). — Collins, 1958, Brit. Mus. 



(Nat. Hist.), Great Barrier Reef Exped. 1928-29, Sci. Rep., vol. 6, no. 6, 



Foraminifera, p. 406. 



This beautiful and distinctive species was originally described from 

 the Miocene of Victoria, Australia. Other records are from the Plio- 

 cene, Pleistocene, and Recent of Australia. The type species of the 

 genus, Discorbis palmerae Bermudez from off Cuba, is very similar to, 

 if not identical with, Bronnimannia haliotis, differing only in its 

 proportionally thicker test. 



The test is biconcave, progressively more so toward the last-formed 

 chambers, and the outline smoothly oval. One side of the test is 

 dotted with thickly set punctae, whereas the wall of the opposite 

 surface is nearly transparent. On this opposite surface the initial 

 coil of chambers appears to stand apart from the final whorl of cham- 

 bers, leaving open sinuses in the places normally occupied by the inner 

 ends of the sutures. 



In the present material, the species is represented best around the 

 islands, but there are a few specimens from the deeper water. 



Genus PLANULINOIDES Parr, 1941 



PLANULINOIDES BICONCAVUS (Jones and Parker) 



Plate 5, Figure 1 



Discorbina biconcava Jones and Parker, in Carpenter, Parker and Jones, 

 1862, Introd. Foraminifera, p. 201, text figs. 32G. — Parker and Jones, 

 1865, Philos. Trans., pp. 385, 422, pi. 19, fig. 10.— Brady (part), 1884, 

 Rep. Voy. Challenger, Zoology, vol. 9, p. 653, pi. 91, fig. 2 (not fig. 3)/ — Egger, 

 1893, Abh. kon. bay. Akad. Wiss., Miinchen, CI. II, vol. 18, p. 393, pi. 18, 

 figs. 45-47. 



Planulinoides biconcavus (Jones and Parker). — Parr, 1941, Mining and Geol. 

 Journ., Mines Dept., Victoria, vol. 2, no. 5, p. 305, text figs. a-c. 



Discorbinella biconcava (Jones and Parker). — Parr, 1945, Proc. Roy. Soc. 

 Victoria, vol. 56 (new ser.), pt. 2, p. 211. 



This species superficially resembles various species of Planulina 

 but is distinguished easily by its elongate aperture set at an angle 

 between the two limbate borders of the truncate periphery. In that 

 the wall is finely, rather than coarsely, perforate on both ventral and 



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