410 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



Spiroloculina (?) convexiiiscula — Material examined. 



SPIROLOCULINA ADVENA, new species. 



Plate 83, figs. la-c. 



Description. — Test inequilateral, one side nearly flat or slightly con- 

 vex, the other deeply excavate in the middle, but with a high raised 

 portion near the middle running lengthwise of the chamber, periph- 

 eral portion again flattened; whole test elliptical, the ends somewhat 

 produced, apertural end slightly extended, aperture smaU, rounded; 

 sutures distinct, wall smooth. 



Length about 1 mm. 



Distribution. — Type specimen (Cat. No. 10949, U. S. N. M.) from 

 Albatross station D5178, off Romblon, in 78 fathoms (143 meters). 



This would have been taken for some sort of abnormal specimen 

 if found alone, but it occurs in the same form at this station in other 

 specimens. It was never found elsewhere, however. Its nearest 

 relative seems to be S. affixa Terquem. 



Spiroloculina advena — Material examined. 



SPIROLOCULINA AFFIXA Terquem. 



Plate 83, figs. 2a-c. 



Spiroloculina affixa Terquem, Mem. Soc. g^ol. France, ser. 3, vol. 1, 1878, p. 55, 

 pi. 5 (10), figs. 13a-c. — HowcHiN, Trans. Roy. Soc. South Australia, vol. 12, 

 1889, p. 2.— Chapman, Journ. Linn. Soc. Zoology, vol. 30, 1907, p. 16, pi. 1, 

 figs. 23-25. 



Spiroloculina inaequilateralis Schlumberger, Mem. Soc. Zool. France, vol. 6, 

 1893, p. 201, pi. 4, figs. 84-86; fig. 3 (in text).— Sidebottom, Mem. Proc. 

 Manchester Lit. and Philos. Soc, vol. 54, No. 16, 1910, p. 2, pi. 1, fig. 2. 



Spiroloculina acutimargo H. B. Brady (in part), Rep. Voy. Challenger, Zoology, 

 vol. 9, 1884, pi. 10, fig. 12 (not figs. 13-15). 



