FOEAMINIFEEA OF THE PHILIPPINE AND ADJACENT SEAS. 117 



Tills species in some of its characters resembles Bolivina heyrichi 

 Reuss. It is a true Textularia, however, and has many points in 

 which it differs from that species. There is a considerable difference 

 in the microspheric and megalospheric forms, both of which are here 

 figured. The microspheric fonn is narrow at the beginning and 

 continues this form for some time, finally broadening out somewhat. 

 The megalospheric form starts almost at once to develop a broad 

 test of fewer chambers, but each has the same characteristic shape 

 of the chambers. 



Textularia semialata — Material exaviined. 



TEXTULARIA FOLIACEA Heron-Allen and Earland. 



Plate 19, figs. 7 a, b. 



Textularia foliacea Heron-Allen and Earland, Trans. Zool. Soc, London, vol. 

 20, 1915, p. 628, pi. 47, figs. 17-20. 



The original description is as follows : 



Test free, highly compressed, consisting of seven to nine pairs of chambers, regu- 

 larly increasing in width so as to give a leaf -shaped outline to the shell. Sutiiral 

 lines depressed, often strongly marked, but at times very obscure, and obliquely set, 

 so that the tapering off of the ultimate pair of chambers gives the characteristic dia- 

 mond or foliaceous outline. Median line of the shell depressed below the marginal 

 edges, aperture small and regularly textularian. Test composed of sand-grains and 

 other adventitious substances firmly and neatly cemented together, but with a rough 

 external surface. 



This is one of the most characteristic of the Kerimba Textulariidae, though not 

 universally distributed. It occurs in the greatest abundance and in its best devel- 

 opment at Stn. 1, and very fine examples were also obtained at Stn. 9. At Stns. 3 

 and 10 the specimens were less characteristic and showed a tendency to pass, by 

 inflation of the chambers, into T. hauerii. 



The affinities of our species are between T. luculenta Brady and T. hauerii or gra- 

 vien d'Orbigny. It may be compared as regards its highly compressed and parallel- 

 faced test with the Textularia immensa of Cushman ^^ from which it differs only in 

 the character of its aperture. 



We have specimens from Timor Sea (Java, 50 fms.), where it is frequent, and 

 from Vavau (S. Pacific, 16 fms.). We have also observed specimens in some of 

 Brady's unsorted material from Fiji at Cambridge, and a single specimen among his 

 specimens of T. agglutinans from "Coral Reef, Australia, 17 fms." It is probably 

 therefore widely distrubuted in coral-reef areas. 



Length, 1 to 1.5 mm.; breadth, 0.6; thickness, 0.3 mm. 



" Proc. U. S. Nat. Mus., vol. 44, 1913, p. 633, pi. T9, 



