36 BULLETIN 161, UNITED STATES NATIONAL MUSEUM 



Variety with the test elongate, elliptical, much compressed, some- 

 what variably depressed in the middle; chambers distinct, earlier 

 ones rectangular in transverse section, periphery truncate, the angles 

 sharply keeled, later chambers much compressed with a single keel ; 

 sutures distinct, little depressed; wall smooth, glossy; apertural end 

 extended into a cylindrical neck and a distinct phialine lip and tooth. 



Holotype of variety. — Cushman Coll. No. 14747, from off Nairai, 

 Fiji Islands, 24 fathoms. 



This variety is very abundant at the type locality, and there are a 

 few other records for it: Mokaujar Anchorage, Fiji; Levuka, Fiji. 

 I have already noted this variety from Samoa. The young stages, 

 which are found with the adults, are very similar to Spiroloculina 

 grateloupi, but as the form develops toward its adult stage there 

 is a very considerable compression of the test, and, in the adult, 

 chambers are developed that are not only compressed but have a 

 definite thin peripheral keel. 



SPIROLOCULINA ANTILLARUM d'Orbigny 



Plate 9, Figubes 3-5 



Spiroloculina antillarum d'Orbigny, in De la Sagra, Hist. Fis. Pol. Nat. Cuba, 

 " Foraniiniferes," p. 166, pi. 9, figs. 3, 4, 1839.— H. B. Brady, Rep. Voy. 

 Challenger, Zoology, vol. 9, p. 155, pi. 10, figs. 21 a, 6, 1884.— Cushman, 

 U. S. Nat. Mus. Bull. 100, vol. 4, p. 407, pi. 81, figs. 4 a, 6; pi. S3, fig. 4 (?), 

 1921; Proc. U. S. Nat. Mus., vol. 59, p. 63, pi. 14, figs. 14, 15, 1921; Car- 

 negie Inst. Washington Publ. 311, p. 61, 1922; Publ. 342, p. 55, pi. 20, 

 fig. 1, 1924; U. S. Nat. Mus. Bull. 104, pt. 6, p. 43, pi. 9, fig. 3, 1929. 



Test elongate, elliptical ; chambers nearly circular in cross section ; 

 surface ornamented by numerous longitudinal costae, often slightly 

 oblique, both ends of the chamber projecting and the intermediate 

 portions thus left either filled by a plate of clear material or occa- 

 sionally open; apertural end projecting and forming a cylindrical 

 neck with a slight lip and a single tooth, sometimes bifid at the 

 tip. Length, 0.55-0.75 mm.; breadth, 0.35-0.4 mm.; thickness, 

 0.15-0.18 mm. 



The original specimens of this species came from off the West 

 Indies and were described by d'Orbigny in 1839. His species was 

 allowed to lapse, and much of the material that should have been 

 recorded as his species has been known under the name of S. grata 

 Terquem, because of the adoption of that name by Brady in the 

 Challenger report for this species of d'Orbigny. As a rule the typi- 

 cal form is more involute than the following variety (angulata), 

 and in the Pacific at least it is much less common. The chambers 



