FOKAMINIFERA OF THE NORTH PACIFIC OCEAN. 33 



ticular, widest at the middle, keeled with sharp angled periphery, 

 not at all lobulated ; surface with the reticulated portion larger than 

 the septal lines; umbilical region umbonate, filled with clear shell 

 material, usually with a few pores: aperture an angled narrow open- 

 ing, V-shaped, divided into several secondary openings. 



Diameter up to 1 mm. 



Distribution. — Brady in the Challenger Report gives this species as 

 found " as far north as Japan". I have found it a number of times in 

 the material I have examined. It occurred in material collected in 

 Gaspar Straits by Captain Rodgers of the U. S. Exploring Expedition, 

 from Hongkong, 9 fathoms: from Cagayan, Philippine Islands, col- 

 lected by Dr. E. A. Mearns. In the Nero material it occurred at- 

 station 990 in 859 fathoms off Guam and station 1237 in 613 fathoms 

 off Yokohama, Japan. In the Albatross material it occurred at sta- 

 tion D4922 in 60 fathoms, D4916 in 361 fathoms, D 4891 in 181 

 fathoms and D 4970 in 500 fathoms. 



POLYSTOMELLA MACELLA (Fichtel and Moll). 



Plate 18, fig. 3. 



Nautilus macellus, var. a, Fichtel and Moll, Test. Micr., 1803, p. 66, pi. 10, 

 figs. e-g. 



Polystomella macella Parker and Jones, Ann. Mag. Nat. Hist., ser. 3, vol. 5, 

 1860, p. 104, No. 8.— H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, 

 p. 737, pi. 110, figs. 8, 9, 11.— Egger, Abh. kon. bay. Akad. Wiss. Miinchen, 

 Cl. ii, vol. 18, 1893, p. 432, pi. 20, figs. 22, 23.— Bagg, Proc. U. S. Nat. Mus., 

 vol. 34, 1908, p. 165. — Sidebottom, Mem. and Proc. Manchester Lit. and 

 Philos. Soc, vol. 53, No. 21, 1909, p. 15, pi. 5, fig. 4; vol. 54, No. 16, 1910, 

 p. 30. 



Description. — Test compressed, with about twenty chambers in the 

 last-formed volution, in face view 3 to 5 times as long as wide, keeled 

 with a sharp-angled periphery, sometimes slightly lobulated at the 

 periphery, surface with the reticulated portion making up most of 

 the area, the septal lines narrow, umbilical region slightly depressed, 

 porous, aperture divided into a number of smaller openings. 



Diameter up to 0.85 mm. 



Distribution. — Bagg records this species from two Albatross stations 

 off the Hawaiian Islands, D 4000 in 104-213 fathoms and H 4430 in 

 1 ,544 fathoms. I have seen it in the material I have examined from 

 the Gulf of Tokyo, in 9 fathoms, Albatross stations D 4825 in 120 

 fathoms and D 4970 in 500 fathoms both off Japan and at Nero sta- 

 tion 1306 in 1,208 fathoms between Yokohama and Guam. 



