FORAMINIFERA OF THE PHILIPPINE AND ADJACENT SEAS. 371 



small dots of similar color; wall usually smooth except on the ven- 

 tral side near the aperture where it is finely papillate. 



Distribution. — This species is very common especially in warm, 

 shallow waters. It is very frequent in waters less than 30 fathoms (55 

 meters) in depth, and makes up a considerable proportion of the sand 

 on some of the beaches. It is most abundant in the region of the Sulu 

 Archipelago, and is usually associated with Heterostegina, Operculina, 

 Alveolina, Orhitolites, and other genera characteristic of this same 

 type of habitat. The deeper records, of which there are compara- 

 tively few, are usually represented by very few specimens. It has 

 occurred in the following localities: China Sea, off southern Luzon; 

 Sulu Archipelago; near Basilan Island: off Jolo Jolo; off Siasi; off 

 Tawi Tawi; off Romblon; off eastern Panay; off northern Cebu; 

 Sogod Bay, southern Leyte; between Burias and Luzon; Gulf of 

 Davao; Verde Island Passage; China Sea, off Hongkong; Palawan 

 Passage; Ragay Gulf, Luzon; between Cebu and Bohol; east coast 

 Luzon; between Samar and Leyte; between Negros and Siquijor; 

 Darvel Bay, Borneo; Buton Strait; and Macassar Strait. 



Amphistegina lessonii — Material examined. 



