46 



BULLETIN 161, UNITED STATES NATIONAL MUSEUM 



chamber, slightly ventral to the periphery. Length of holotype, 

 0.32 mm; breadth, 0.2 mm; thickness, 0.12 mm. 



Holotype. — Cushman Coll. No. 15669, from 12 fathoms off Levuka, 

 Fiji. 



Tliis is a small but very distinctive and fairly common species 

 in the collections from the South Pacific. 



The species is also recorded from Rongelap Atoll; 21 fathoms, 

 Guam Anchorage, Ladrone Islands; Port Lotten, Kersail, Caroline 

 Islands; Mokaujar Anchorage, Fiji; and a few specimens from 

 the Albatross stations in deeper water, data for which are given in 

 Table 25. 



Table 25. — Nonionella translucens — material examined 



NONIONELLA sp. (?) 



Plate 11, Figures 3a-c 



The small specimen figured, while apparently a Nonionella, is 

 represented by a single specimen from Albatross Station H3829, 

 latitude 14° 56' S., longitude 148° 48' W., in 860 fathoms, and until 

 more is known about it from further specimens it seems wise not to 

 assign a definite name to it. 



Genus ELPHIDIUM Montfort. 1808 



Elphidium Montfort, Conch. Syst., vol. 1, p. 15, 1808. 



Synonyms: Geophonus Montfort, 1808; Pelorus Montfort, 1808; Andro- 

 medes Montfort, 1808; Sporilus Montfort, 1808; Themeon Montfort, 

 1808; Cellanthus Montfort, 1808; Vorticialis Lamarck, 1812; Polystomella 

 Lamarck, 1822; Robulina (part) Munster, 1838; Geoponus Ehrenberg, 

 1839 (1841); Nonionina (part) Boll, 1846; Helicoza Moebius, 1880. 



Test typically planispiral, bilaterally symmetrical, mostly involute; 

 chambers numerous, with distinct sutures either depressed or raised 

 and limbate, with septal bridges and depressions; wall calcareous, 



