FORA.MINIFERA OF THE PHILIPPINE AND ADJACENT SEAS. 51 



what would be expected from the distribution of this species else- 

 where. 



These specimens shovr the typical structure of long acerate spicules 

 arranged lengthwise of the test in the outer layer, and those of the 

 inner layer arranged horizontally around the interior at right angles 

 to those of the outside. 



Genus THOLOSINA Ruhmbler, 1895. 



THOLOSINA BULLA (H. B. Brady). 



Plate 3, figs. 1, 2; plate 4, fig. 4. 

 Placopsilina bulla H. B. Brady, Quart. Journ. Micr. Sci., vol. 21, 1881, p. 51; Rep. 



Yoy. Challenger, Zoology, vol. 9, 1884, p. 315, pi. 35, figs. 16, 17. 

 Tholosina bulla Rhumbler, Naclir. kon. Ges. Wiss. Gottingen, 1895, p. 82. — Cdsh- 

 MAN, Bull. 71, U. S. Nat. Mus., pt. 1, 1910, p. 49, figs. 58a, b (in text); Bull. 104, 

 U. S. Nat. Mus., pt. 1, 1918, p. 63, pi. 25, fig. 6. 

 Specimens of this species attached to Rliabdammina, usually R. ir- 

 regularis, and occasionally to Hyperammina, have been found at 

 several stations. The specimens usually have a single, undivided 

 chamber, but occasionally it is partially or wholly divided into two 

 portions. 



The typical form of the species somewhat broken and showing the 

 interior is given in plate 4, figure 4. A very hispid variety is shown 

 in plate 3, figure 1, and a form with a prominent aperture rising some- 

 what from the surface in plate 3, figure 2. This form of aperture 

 seems always to be accompanied by a smooth surface. 



The following localities are represented: Ragay GuK, Luzon; Jolo 

 Sea; between Negros and Siquijor, Sibuko Bay, Borneo; GulfofBoni; 



and Flores Sea. 



Tholosina bulla — Material examined. 



