FORAMINIFEEA OF THE ATLANTIC OCEAN. 17 



TEXTULARIA MEXICANA, new species. 



Plate 2, fig. 9. 



Texlularia rugosa Reuss, var., Goes, Bull. Mus. Comp. Zool., vol. 29, 1890, p. 



43, pi. 5, figs. 4, 5. 

 Texlularia carinata Flint (not d'Orbigny), Rep. U. S. Nat. Mus., 1897 (1899), 



p. 284, pi. 29, fig. 1. 



Description. — Test much compressed, about one and one-half times 

 as long as broad, the apical end triangular, bluntly pointed, apertural 

 end rounded or slightly angular, periphery sharp, test thickest near 

 the middle, rhomboid in end view; chambers numerous, distinct, 

 broadest at the apertural end, thence concave toward the inferior 

 margin; sutures clear-cut, depressed, wall coarsely arenaceous, 

 roughened, especially over the sutures which are raised, united in 

 the center to form a definite high ridge, especially in the latter half of 

 the test; aperture semicircular, at the base of the inner margin of the 

 last-formed chapiber; color grayish- white. 



Length up to 1.5 mm. 



Distribution. — Type-specimen (U.S.N.M. No. 16948) from Alba- 

 tross station D2377, in the northern part of the Gulf of Mexico, 

 in 210 fathoms (384 meters). It has also occurred at three stations 

 in this immediate vicinity, and a single specimen possibly this species 

 occurred at D2313, off the coast of Georgia. This seems to be a very 

 distinct species found in considerable numbers at these stations, 

 but not occurring elsewhere in the western Atlantic material that I 

 have seen. A study of the Goes collection shows that this is the 

 species from D2399, recorded by him as T. rugosa, variety, and 

 Flint's specimens horn. Albatross D2400, which he figures, are the same. 

 This is very close indeed to T. millettii Cushman.^^ This species is 

 known from the Hawaiian Islands and from Guam and the coast of 

 Japan. It lacks the very high central ridge of the species from the 

 Gulf of Mexico, and its end view is less broad in consequence. The 

 two are however very closely related. This seems to be another of the 

 species from the Gulf of Mexico which has its relationships in the 

 Pacific rather than the other parts of the Atlantic region. 



Texularia mexicana — material examined. 



" BuU. 71, U. S. Nat. Mus.. pt. 2, 1911, p. 13, figs. 18, 19 (in text). 



