FORAMINIFERA OF THE ATLANTIC OCEAN 71 



Test in the adult generally globular; chambers irregularly trochoid^ 

 becoming strongly involute in the adult; wall calcareous, perforate; 

 aperture circular, with a verj^ short neck and flaring lip. ' 



Tertiary and Recent. 



SIPHONINOIDES ECHINATA (H. B. Brady) (?) 



Plate 14, figures 6 a, 6 



The figured specimen is from off the Tortugas, Fla., in comparatively 

 shallow water. It is referred to Brady's species until more material 

 may be available for a fuller understanding of its characters. Siphon- 

 inoides is a typically Indo-Pacific genus, and this is the only record from 

 the Atlantic. Other typical Indo-Pacific species have occurred at 

 the Tortugas, so the specimen probably is not an accidental one from 

 some other material as might at first be suspected. 



Genus SIPHONINELLA Cushman, 1927 



Siphoninella Cushman, Contr. Cushman Lab. Foram. Res., vol 3, 1927^ 



p. 77; Special Publ. No. 1, Cushman Lab. Foram. Res., 1928, p 279. 

 Truncatulina H. B. Brady, 1881 (not d'Orbigny). 



Genoholotype. — Truncatulina soluta H. B. Brady. 



Test in the early stages sim.ilar to SiphGnina, in the later develop- 

 ment with the chambers becoming uncoiled ; Vv^all calcareous, perforate,^. 

 aperture in the adult terminal, elliptical, with a neck and lip. 



Eocene to Recent. 



There are now three species of this genus know^n: One from the 

 Claiborne Eocene of Louisiana, one from the lower Oligocene, Byram 

 marl of Mississippi, and the living species of Brady. 



SIPHONINELLA SOLUTA (H. B. Brady) 



Plate 14, figures 5 a-c 



Truncatulina soluta H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, 

 p. 670, pi. 96, figs. 4 a-c. — Chapman, Journ. Linn. Soc. ZooL, vol. 28, 1902, 

 p. 406 (list). 



Siphoninella soluta Cushman, Contr. Cushman Lab. Foram. Res., vol. 3, 

 1927, p. 77, pi. 16, fig. 13; Proc. U. S. Nat. Mus., vol. 72, art. 20, 1927, 

 p. 12; Special Publ. No. 1, Cushman Lab. Foram. Res., 1928, pi. 40, fig. 10; 

 pi. 41, fig. 13. 



Test with all but the last 2 or 3 chambers trochoid, close-coiled, the 

 last ones becoming uncoiled, periphery acute, with a distinct keel, 

 tubulated; wall of the early chambers smooth, later with a few blunt 

 spines with a row of spines along the sutures; aperture narrowly 

 elliptical with a short constricted neck and distinct lip. 



Length, 0.38 mm.; breadth, 0.25 mm.; thickness, 0.10 mm. 



The t3^pes of this species are from Challenger Station 24 off Culebra 

 Island in the West Indies, 390 fathoms. It is recorded by Brady 

 as "very rare." Chapman has listed the species from about Funafuti 

 in the Pacific. These seem to be the only records. 

 2305—31 6 



