70 SHALLOW-WATER FORAMINIFERA OF TORTUGAS REGION. 
Earland, this may be the same as the species which d’Orbigny 
named Q. variabilis, but as that species was undescribed and not 
figured until Fornasini’s publication in 1905, Millett’s name must be 
kept and d’Orbigny’s allowed to lapse. 
Genus ARTICULINA d’Orbigny, 1826. 
Articulina sagra d’Orbigny. 
Articulina sagra d’Orbigny, in De la Sagra, Hist. Fis. Pol. Nat. Cuba, 1839, ‘‘ Forami- 
niféres,”’ p. 160, pl. 9, figs. 23 to 26.—Cushman, Proc. U. S. Nat. Mus., vol. 59, 
1921, p. 73, pl. 18, figs. 2 to 5. 
Test elongate, composed of two portions, the earlier triloculine, the later 
uniserial, the triloculine portion generally elliptical, with a rounded periph- 
ery and longitudinal cost, the uniserial portion consisting of from 1 to 3 
chambers, each broader than the preceding, transverse section circular or 
broadly elliptical; the aperture the broadest portion of the test, with an everted 
lip; the wall of the chamber longitudinally costate. 
The longest of the Tortugas specimens measures 1 mm. 
D’Orbigny’s type figures show specimens very similar to those 
figured here, and this is undoubtedly the same as the form that he 
had. It is not common in the Tortugas region. D’Orbigny’s speci- 
mens were from Cuba, Jamaica, and Martinique. 
Articulina mexicana, new species. 
(Plate 11, Figures 7, 8.) 
Vertebralina sp. Cushman, Proc. U. S. Nat. Mus., vol. 59, 1921, p. 64. 
Test somewhat compressed, generally rounded, the last-formed coil com- 
posed of 2 to 3 chambers; sutures somewhat indistinct, the single, uniserial 
chamber in the adult somewhat more compressed toward the apertural end, 
which has a somewhat everted lip, but extending only slightly beyond the 
general outline of the chamber; surface smooth, shining. 
Length of the largest specimens slightly exceeding 1 mm. in the Tortugas 
collection. 
This species is very abundant at one station and rare at one 
other, both stations on the outer or open-ocean side of Loggerhead 
Key. They are similar to specimens which I had from the north 
coast of Jamaica. The test is a thick one, smooth and shining. 
Specimens with the uniserial chamber are rare. 
Articulina lineata H. B. Brady. 
(Plate 12, Figure 4.) 
Articulina lineata H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 183, pl. 12, 
figs. 19 to 21.—Cushman, Proc. U. 8. Nat. Mus., vol. 59, 1921, p. 73, pl. 18, fig. 6. 
Test much compressed, even in the early portion, which is triloculine, the 
later portion consisting of 1 or 2 much compressed chambers in linear arrange- 
ment; the aperture with a lip much thickened at the edge, but not everted and 
not extending out beyond the periphery of chamber; chambers distinct, with 
numerous fine longitudinal costs; wall translucent, of a bluish-white color. 
Length of the Tortugas specimens up to 1 mm. 
A. lineata was described by Brady from the Fijis, and was also 
recorded off Bermuda by him. I had specimens from two stations 
