MILIOLIDAE—VERTEBRALINA. 63 
body of each chamber with numerous, somewhat oblique costz, the last- 
formed chamber often projecting beyond the periphery of the preceding coil, 
but carinate, like the earlier ones; aperture elongate, with a distinct, everted 
lip; early chambers, where visible, spiroloculine. 
Diameter of the Tortugas specimens up to or slightly exceeding 1 mm. 
D’Orbigny described this species from the shore sands of Cuba. 
Brady placed it as a synonym of Articulina sagra d’Orbigny. A 
study of these carinate specimens, however, shows that they are 
really Vertebralina and not Articulina. In the Tortugas region this 
species is very distinct from the following and may be specifically 
or even generically different. Vertebralina cassis does not tend to 
form a linear series of chambers, usually a single one in the adult 
being all that follows the close-coiled development, and this does 
not usually have the decided backward extension of the lip as in 
the following variety. While not as common as the following, this 
species has occurred at several stations in the area. 
Vertebralina cassis d’Orbigny var. mucronata d’Orbigny. 
Vertebralina mucronata d'Orbigny, in De la Sagra, Hist. Fis. Pol. Nat. Cuba, 1839, ‘‘ Forami- 
niféres,’’ p. 72, pl. 7, figs. 16 to 19; Foram. Foss. Vienne, 1846, p. 120, pl. 21, figs. 18, 
19.—Cushman, Proc. U.S. Nat. Mus., vol. 59, 1921, p. 64, pl. 15, figs. 2, 3, 5 to 8 
(not 1, 4). 
Test of the early portion close-coiled, usually without a carina, the uncoiled 
portion consisting in the adult usually of 2 chambers, compressed, the last 
one much broader than the preceding, the apertural end with an everted lip 
extending back on both sides to a recurved projection; surface ornamented 
with numerous raised cost, somewhat shiny; color white. 
Length of the Tortugas specimens usually not exceeding 1 mm. 
This is one of the common species of the region and fits very closely 
d’Orbigny’s original figure of the adult (plate 7, fig. 16). Although 
I have placed this as a variety of Vertebralina cassis, it may be that 
this should be placed under Articulina as a distinct species. While 
the later chambers are compressed, the earlier ones, as a rule, are 
triloculine, which would seem to prove that this is really an Articu- 
lina. The mass of the test is made up of uniserial chambers, whereas 
in V. cassis there is a single chamber which is merely an addition 
to the much larger coiled part. 
I have recorded both of these from the north coast of Jamaica 
under the name Vertebralina cassis. Brady placed both of these 
under Articulina sagra d’Orbigny, which seems, from a study of the 
Tortugas material, to be distinct from either of them. 
Genus QUINQUELOCULINA d’Orbigny, 1826. 
Quinqueloculina agglutinans d’Orbigny. 
ee agglutinans d’Orbigny, in De la Sagra, Hist. Fis. Pol. Nat. Cuba, 1839, 
Foraminiféres,’”’ p. 195, pl. 12, figs. 11 to 13. 
Test longer than broad; wall, at least on the exterior, composed of agglu- 
tinated sand-grains, forming a roughened surface; the periphery of the cham- 
bers broadly rounded; sutures fairly distinct; aperture slightly extended into 
a subcylindrical neck which, in well-preserved specimens, has 2 teeth extend- 
