TROPICAL PACIFIC FORAMESTIFERA OF "ALBATROSS" H 



Rosalind opima (Cushman). — Todd, 1958, Rep. Swedish Deep-Sea Exped., 



vol. 8, Sediment Cores, no. 3, p. 196, pi. 1, fig. 16. 

 Discorbis candeiana (d'Orbigny).— Phleger and Parker, 1951, Geol. Soc. 



Amer. Mem. 46, pt. 2, p. 20, pi. 10, fig. 3.— Todd, 1957, U.S. Geol. Surv. 



Prof. Paper 280-H, p. 290 (tbl. 4), pi. 90, fig. 9.— Graham and Militants 



1959, Stanford Univ. Publ., Geol. Sci., vol. 6, no. 2, p. 93, pi. 13, fig. 22. 



This species was described from shallow water of the Dry Tortugas 

 off Florida. It appears to be very widely distributed in warm shallow 

 waters of both the Atlantic and Pacific Oceans, being recorded from 

 many areas under several names, only a few of which are included 

 above. It is probably the same species as that described and named 

 by d'Orbigny from Cuban sands, Rosalina candeiana (d'Orbigny, 

 1839, p. 97, pi. 4, figs. 2-4). Banner and Blow (1960a, p. 37), how- 

 ever, found that the only two syntypes of Rosalina candeiana in 

 existence are a bolivinid and a polymorphinid. Moreover, the sub- 

 sequently described species, Discorbis floridana Cushman and Discorbis 

 opima Cushman, are better illustrated and more widely used in the 

 literature than Rosalina candeiana has been, and the concept of both 

 these species is more stable than has been the concept of Rosalina 

 (or Discorbis) candeiana. I follow, therefore, the commendable 

 suggestion of Banner and Blow (1960a, p. 37) that Rosalina candeiana 

 be considered a nomen dubium and be abandoned. 



In the present material from the tropical Pacific, Rosalina floridana 

 is well represented, particularly in the samples from the shallower 

 water, and is probably attached to seaweed during life. Because 

 of its habit of attachment, it is quite variable in form. 



Average size of specimens is slightly larger than that of R. micens, and 

 the outline of the test is less likely to be circular and is often elongate. 

 The distinction between the wall of the opposite sides is characteristic 

 of this species; the dorsal surface is rather coarsely and densely 

 punctate, whereas the ventral surface is glassy and shows no noticeable 

 punctation. The periphery is angled bluntly and the ventral surface 

 is slightly concave. But, contrasted with the smoothly concave 

 ventral surface of R. micens, the ventral surface is irregular and 

 undulating and, in some specimens, has several blunt knobs extending 

 inward toward the central (umbilical) part of the test. 



ROSALINA GLOBULARIS d'Orbigny 



Plate 3, Figure 4 



Rosalina globularis d'Orbigny, 1826, Ann. Sci. Nat., vol. 7, p. 271, no. 1, pi. 13, 

 figs. 1-4; Modeles No. 69, III« livr. 



Rare specimens found in a few of the shallower samples appear to 

 belong in this common attached species that serves as the type spe- 

 cies for Rosalina. 



729-019 — 65 2 



