FORAMtXIFERA OF NORTH PACIFIC OCEAN. 



23 



elliptical opening, surrounded by a raised lip, somewhat above the 

 base of the inner wall of the chamber. 



Length 0.5-1.0 mm. 



Distribution. — This species is apparently not common in .the 

 North Pacific. It has been noted occasionally in the material from 

 about the Hawaiian Islands. 



TEXTULARIA CATENATA, new species. 



Description. — Test elongate, rounded in cud view, composed of 

 inflated chambers separated by rather deep sutures, making the 

 outline of the test sin- 

 uate; wall somewhat 

 coarsely arenaceous; aper- 

 ture in the earl}' chambers 

 slit-like at the ventral bor- 

 der of the inner margin, 

 in later chambers grad- 

 ually moving away from 

 the margin and in the last- 

 formed chamber subter- 

 minal and rounded. 



Length about 1 mm.; 

 microspheric proloculum 

 0.022 mm. 



Distribution . — This spe- 

 cies was obtained from 

 two Nero stations in the 

 western North Pacific, sta- 

 tion 1160 (type), in 1,907 

 fathoms and station 1320, 

 in 2,048 fathoms. These 

 stations are between 

 Yokohama and Guam, 

 one occupied on the 

 northern voyage, the other 

 on the return. They are 

 in depth is unimportant. 



Type.— Cat. No. 8335, U.S.N. M. 



The microspheric form of the species which is here figured has 

 several small chambers in a coil about the proloculum. Then 

 follows a series of broad low chambers, arranged biserially (fig. 40.) 



Such species as this, with the terminal rounded aperture, have 

 clearly essential characters different from the typical species of 

 Textularia with the elongated aperture at the base of the inner 

 border, yet these forms here described are evidently directly related 

 to typical Textularia as is shown in their early development. 



Figs. 39-40.— Textularia catewtv. 39, a, froxt view; b, 



APERTURAL VIEW. X 60. 40, ANOTHER SPECIMEN', MICRO- 

 SPHERIC, BY TRANSMITTED LIGHT. SHOWING THE MICRO- 

 SPHERIC PROLOCCLUM FOLLOWED BY FOUR CHAMBERS IN A 

 COIL BEFORE THE BISERIAL CONDITION IS TAKEN ON. X 120. 



but a few miles apart and the difference 



