406 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



Distrihutiov.—Ty-pe specimen (Cat. No. 10980, U.S.N.M.) from 

 Albatross station D5236, Pacific Ocean, east coast of Mindanao, in 

 494 fathoms (903 meters), where the variety is very common. 



In this variety the whole chamber is rounded, without the costae 

 of the typical form. In adult specimens the chambers decrease 

 in length and fail to make up the entire half volution as in the 

 typical. 



Spiroloculina costifera, var. plena — Material examined. 



SPIROLOCULINA SCROBICULATA, new species. 



Plate 81, figs, la, b. 



Description. — Test elliptical in face view, composed of numerous 

 chambers, each circular in transverse section, sutures deep; apertural 

 end continued into an elongate cylindrical neck with a slight everted 

 lip; surface peculiarly scrobiculate almost irregularly reticulate 

 with very fine markings, with low magnification appearing simply 

 granular. 



Length up to 1.25 mm. 



Distribution. — Type specimen (Cat. No. 10944, IT. S.N. M.) from 

 Albatross station D5 181, off eastern Panay, in 26 fathoms (48 meters) . 

 It has also occurred at D5342, Malampaya Sound, Palawan, in 14 to 

 25 fathoms (25 to 46 meters). 



This is a very peculiarly ornamented species, and should be 

 looked for elsewhere in shallow water of the Indo-Pacific region. 



SPIROLOCULINA ELEGANS Cushman. 



Plate 80, figs. 4a, b. 

 Spirolomlina elegans Cushman, Carnegie Inat., Dept. of Marine Biology, vol. 9, 

 1918, p. 290, pi. 96, figs, la, lb, 2. 

 Description. — Test one and a half as long as wide, much compressed, 

 peripheral margin broadly roimded, apertural end somewhat exserted, 



