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BULLETIN 161, UNITED STATES NATIONAL MUSEUM 



very distinct, usually slightly depressed ; Avail either smooth or more 

 frequently with slight elongate pits covering much of the surface; 

 aperture elongate, somewhat rectangular, but usually narrowest 

 toward the base, toward each a simple narrow tooth extends into the 

 opening. Length, 1-1.3 mm.; breadth, 0.4-0.5 mm.; thickness, 0.2- 

 0.25 mm. 



D'Orbigny described this species originally from the West Indies, 

 from Jamaica and Cuba. The Indo-Pacific specimens seem to show 

 a wide variation the extremes of which seem very distinct, but with 

 a large series these distinctions are usually bridged. 



It is one of the commonest species in our collections, occurring off 

 Fiji Islands at Mokaujar Anchorage ; 12 fathoms off Levuka ; Vavau 

 Anchorage, Tonga Islands; Eutavu; Makemo Lagoon; Pinaki; and 

 beach off wharf Hereheretue. There are also specimens noted in the 

 accompanying table from two Albatross stations. 



Table 6. — Quinqueloculina polygona — material examined 



1 Key to abbreviations is given in Table 1. 



QUINQUELOCULINA SAMOAENSIS Cushman 



Plate 7, Figures 1 a-c 



Quinqueloculina samoaensis Cushman, Carnegie Inst. Washington Publ. 342, 

 p. 59, pi. 21, figs. 4-7, 1924. 



Test slightly longer than broad, periphery either squarish in the 

 adult or with a blunt keel in the young, often sinuous; wall thick, 

 with an encrusting of fine sand grains, initial end of the chamber 

 extended and the apertural end elongated slightly into a cylindrical 

 neck with a phialine lip and single tooth. Length, 0.65 mm.; 

 breadth, 0.45 mm. ; thickness, 0.3 mm. 



This species, originally described from shallow water collections 

 at Samoa, seems to be widely distributed in the collections examined, 

 occurring at the following localities: Mokaujar Anchorage, Fiji; 

 Levuka, Fiji, 12 fathoms; off Nairai, Fiji, 12-24 fathoms; inside 

 the lagoon, Pinaki Atoll, Paumotus ; off Rotonga, 7 fathoms ; Vavau 

 Anchorage, Tonga Islands, 18 fathoms; off Niau; Port Lotten, 

 Kersail, Caroline Islands; and Guam Anchorage, Ladrone Islands, 

 21 fathoms. 



