TROPICAL PACIFIC FORAMINIFERA OF "ALBATROSS" 19 



Rare specimens in four of the shallow-water samples belong in this 

 distinctive species, which was described from the West Indies but 

 probably has a worldwide distribution in the equatorial regions. 

 It can be distinguished by the neat pattern of coarse wall perforations 

 outlining the chambers on the dorsal surface. 



Genus GYROIDINA d'Orbigny, 1826 



GYROIDINA GEMMA Bandy 



Gyroidina gemma Bandy, 1953, Journ. Paleont., vol. 27, p. 179, pi. 23, fig. 4. — 

 Uchio, 1960, Cushman Found. Foram. Res. Spec. Publ. 5, pi. 8, figs. 19-21. 



Rare specimens from a few deep-water samples appear to belong to 

 this species, which was described and has been reported thus far only 

 from off southern California. 



The species is distinguishable from Gyroidina soldanii d'Orbigny 

 by its more acutely angled periphery. The specimens resemble 

 Eponides more than they do Gyroidina because of the triangular 

 rather than quadrangular shape of the apertural face. The dorsal 

 surface is smooth and slightly convex. The ventral surface is rather 

 evenly conical with the small umbilicus at the apex of the cone. 

 The aperture is a small rimmed opening about halfway between the 

 umbilicus and the periphery. 



GYROIDINA LAMARCKIANA (d'Orbigny) 



Plate 6, Figure 3 



Rotalina lamarckiana d'Orbigny, 1839, in Barker-Webb and Berthelot, 



Hist. Nat. lies Canaries, Paris, vol. 2, pt. 2, Foraminiferes, p. 131, pi. 2, 



figs. 13-15. 

 Gyroidina lamarckiana (d'Orbigny). — Phleger, Parker, and Peirson, 1953, 



Rep. Swedish Deep-Sea Exped., vol. 7, Sediment Cores, no. 1, p. 41, pi. 8, 



figs. 33, 34. 

 Gyroidina soldanii d'Orbigny. — Cushman (part), 1931, U.S. Nat. Mus. Bull. 



104, pt. 8, p. 38, pi. 8, fig. 3 (not figs. 4-8). 



A few specimens appear to belong in this species described from off 

 the Canary Islands. 



The species is rather compressed for Gyroidina. Number of cham- 

 bers per final whorl ranges from 6 to 10. 



GYROIDINA SOLD ANn d'Orbigny 



Plate 6, Figure 4 



Gyroidina soldanii d'Orbigny, 1826, Ann. Sci. Nat., vol. 7, p. 276, no. 5; Modeles 



no. 36, He livr— Cushman (part), 1931, U.S. Nat. Mus. Bull. 104, pt. 8, 



p. 38, pi. 8, figs. 4-8 (not fig. 3). 

 Rotalia soldanii d'Orbigny. — Brady, 1884, Rep. Voy. Challenger, Zoology, vol. 9, 



p. 706, pi. 107, figs. 6, 7. 

 Gyroidina neosoldanii Brotzen, 1936, Sver. Geol. Under., ser. C, no. 396, p. 



158.— Parker, 1954, Bull. Mus. Comp. Zool., vol. Ill, no. 10, p. 528, pi. 



9, figs. 9, 10. 



