22 SHALLOW-WAT i:r foraminifera of tortugas region. 



There is a tendency to strengthen the very thin test by the build- 

 ing of supporting interior walls. In this specimen there is usually 

 a single long wall across the chamber, with secondary ones at the 

 sides, but on the final chamber there are at least two long walls, 

 besides the supplementary ones. The spicular bodies are rather 

 uniform in size, on the ventral side running more or less parallel 

 to the margin, while on the dorsal side they are more nearly radial. 

 The aperture is small, at the ventral border of the chamber, and has 

 a slight projecting lip above it, of about the width of two of the 

 spicular bodies. Our specimen is very nearly free from any foreign 

 material, the spicules being neatly cemented and forming practically 

 the entire wall of the test. 



This is one of the interesting finds of the collection, giving an 

 Atlantic record for this hitherto Pacific species. It is unknown in 

 a fossil condition, and is now known from the Pacific from Funafuti 

 (Chapman), the Malay region (Millett), the South Pacific and the 

 Gulf of Manaar (Carter), the Gulf of Suez (Brady), the Kerimba 

 Archipelago off southeastern Africa (Heron-Allen and Earland), and 

 the Mediterranean (Sidebottom). 



Family TEXTULARIID^. 



Genus TEXTULARIA Defrance, 1824. 



Textularia agglutinans d'Orbigny. 



(Plate 1, Figure 6.) 



Textularia agglutinans d'Orbigny, in De la Sagra, Hist. Fis. Pol. Nat. Cuba, 1839, " Foramin- 

 ifferes," p. 136, pi. 1, figs. 17, 18, 32 to 34.— Cushman, Proc. U. S. Nat. Mua., 

 vol. 69, 1921, p. 49, pi. 11, figs. 1 to 3. 



Test elongate, tapering from the subacute base to the broadly rounded 

 aperteral end; chambers numerous, inflated; sutures depressed; in side view 

 chambers wider than high; wall arenaceous, but rather smoothly finished; 

 aperture an elongate, somewhat arched, opening at the inner margin at the 

 base of the last-formed chamber; color white. 

 • Length of the Tortugas specimens up to 1 mm. 



Textularia agglutinans has occurred at nearly all the Tortugas 

 stations, usually in considerable numbers. There seem to be two 

 forms of this species — a microspheric form in which the total length 

 is greater and the early development commencing with smaller 

 chambers, so that the initial end is pointed and tapering, and a 

 megalospheric form which is more bluntly pointed at the end, not 

 nearly so tapering, shorter, and of fewer chambers. D'Orbigny's 

 specimens were much like those shown in plate 1, figure 6. He 

 gives 1 mm. as the length of these specimens. They were from 

 Cuba, St. Thomas, Martinique, and Jamaica. I have already 

 recorded the species from shallow water from the north coast of 

 Jamaica, and it is doubtless common in such habitats in the Gulf 

 of Mexico and the Caribbean region. 



