FORAMINIFERA OF NORTH PACIFIC OCEAN. 



127 



Description. — Test ovoid, early chambers spiral, hidden by the 

 later chambers which are in a plane oblique to the early ones and very 

 involute, inflated, three or four chambers visible in an adult speci- 

 men; wall arenaceous with an excess of cement, smooth and polished, 

 aperture an elongate slit at 

 the base of the chamber ; color 

 yellowish or reddish brown 

 with some of the chambers 

 gray in some specimens. 



Diameter 0.14-0.75 mm. 



Distribution. — From the 

 Challenger work there are 

 four recorded stations in 1,850 

 to 3,950 fathoms. Goes re- 

 cords the species from a sin- 

 gle Albatross station, 3375 in 

 1,201 fathoms, rare. I have 

 examined the material se- 

 lected by Goes and also that 

 recorded by Bagg from the 

 vicinity of Hawaii in 689- 

 1,398 fathoms, and in both 

 cases the material seems to 

 be typical. The species has 

 occurred at three Nero sta- 

 tions, 170 in 1,990 fathoms 

 near Midway Island and at 

 two stations 1155 and 1389 

 in 1,632 and 1,653 fathoms, 

 between Yokohama and 

 Guam. It has also occurred 

 at three Albatross stations^ 

 TI2898 and H2999, in 1,265 

 and 549 fathoms near the 

 Hawaiian Islands, and D4979 

 in 943, fathoms off Japan. 



This is a very characteristic species of small size, and with little 

 variation. It usually occurs in but few numbers and most of the 

 stations for the species are in deep water. 



AMMOCHILOSTOMA GALEATA (H. B. Brady). 



Trochammina galeata H. B. Brady, Quart. Journ. Micr. Sci., vol. 21, 1881, p. 52 

 Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 344, pi. 40, figs. 19-23.— 

 Egger, Abh.kon. bay. Akad.Wiss. Munchen.vol. IS, 1893, p. 265, pi. 5, figs. 

 32-43. 



Ammochilosloma galeata Eimer and Fickert, Zeitschr. wiss. Zool., vol. 65, 1899, 

 p. 692, fig. 39 (in text). 



FIG. 197.— AMMOCHILOSTOMA PAUCILOCULATA. THKEE 

 VIEWS OF SAME SPECIMEN. X 100. 



