28 SHALLOW-WATER FORAMINIFERA OF TORTUGAS REGION. 



formed chambers are still more compressed, with a sharp edge, and 

 are composed of clear, transparent shell material, the wall being not 

 ev^en punctate over a large part of the surface. 



Bolivina rhomboidalis (Millett). 



Textularia rhomboidalis Millott. Journ. Roy. Micr. Soc, 1899. p. 559, pi. 7, fig. 4. — Side- 

 bottom. Mem. Proc. Manchester Lit. Philos. Soc. vol. 49, 1905. No. 5, p. 8. pi. 2. fig. 2. 



Test generally triangular in front view, increasing in breadth from the 

 rather bluntly pointed initial end to the broad apertural end, which is oblique; 

 chambers numerous, distinct, obUquely placed, so that the test in end view, 

 instead of having the sides at right angles to one another, has them more or 

 less oblique, giving a rhomboid shape to the test in end view; wall translucent, 

 coarsely punctate; aperture a low slit at the base of the inner margin of the 

 last-formed chamber within a reentrant of the margin; color white. 



Length of the Tortugas specimens 0.40 mm. 



This is from station 28, in Bird Key Harbor, in 4.75 fathoms. This 

 species was described by Millett under the genus Textularia from 

 the Malay Archipelago, and he gives also Challenger station 185, off 

 Raine Island, and other localities in Torres Strait, and also the 

 iEgean Sea. Sidebottom's specimens were from the Mediterranean. 

 This single Tortugas specimen is very similar to that figured by 

 Millett. It has not previously been recorded from the Atlantic, but 

 should be looked for further in the West Indian region. 



Genus VERNEUILINA d'Orbigny, 1840. 



Verneuilina spinulosa Reuss. ^ 



(Plate 3, Figure 11.) 



Verneuilina spinulosa Reuss, Denkschr. Akad. Wiss. Wien, vol. 1, 1850, p. 374, pi. 47. fig. 12. — 

 Egger, Neues Jahrb.. 1857, p. 292, pi. 9, figs. 17, 18.— H. B. Brady, Rep. Voy. 

 Challenger, Zoology, vol. 9. 1884, p. 384, pi. 47, figs. 1 to 3.— H. B. Brady, Parker, 

 and Jones, Trans. Zool. Soc. London, vol. 12, 1888, p. 219, pi. 42, fig. 15 (not fig. 

 14). — Wright, Proc. Roy. Irish Acad., ser. 3, vol. 1, 1891, p. 472. — Chapman, 

 Journ. Linn. Soc. Zool., vol. 28, 1900 (1902), p. 185.— MiUet, Journ. Roy. Micr. 

 Soc, 1900, p. 11. — Sidebottom, Mem. Proc. Manchester Lit. Philos. Soc, vol. 49, 

 No. 5, 1905, p. 10, pi. 2, fig. 5. — Rhumbler, Zool. Jahrb., Abth. Syst., vol. 24, 1906, 

 p. 61, pi. 5, fig. 53. — Bagg, Proc. U. S. Nat. Mus., vol. 34, 1908, p. 132. — Cushman, 

 Bull. 71, U. S. Nat. Mus., pt. 2. 1911, p. 55, fig. 88 (in text). — Heron-Allen and 

 Earland, Tran?. Zool. Soc London, vol. 20, 1915, p. 631. — Cushman, Carnegie Inst. 

 Wash., Pub. 291, 1919. p. 34; Proc U. S. Nat. Mus., vol. 59, 1921, p. 51. 



Test pyramidal, triangular in transverse section, the sides flat and sUghtly 

 concave, the initial end sharply pointed, thence gradually tapering to the 

 greatest width, which is somewhat below the apertural end, periphery angled, 

 sometimes spinose, the initial end sometimes with a short apical spine; 

 chambers numerous, distinct; sutures slightly if at all depressed; wall smooth, 

 punctate, the punctations often largest and most numerous near the borders 

 of each chamber; the aperture at the inner margin of the last-formed chamber. 



Length of the Tortugas specimens usually not exceeding 0.5 mm. 



The species is not common in the region, but has occurred at 7 

 of the 20 stations. It is a common species in comparatively shallow 

 water in tropical regions. 



