FORAMINIFERA OF THE NORTH PACIFIC OCEAN. 43 



QUINQUELOCULINA ALVEOLINIFORMIS, (H. B. Brady). 



Miliolina alveoliniformis H. B. Brady, Quart. Journ. Micr. Sci., vol. 19, 1879, 

 p. 52; Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 181, pi. 8, figs. 15-20. 



Description. — Test elongate, fusiform, composed of numerous 

 chambers, long and narrow, five to eight visible from the exterior; 

 wall in young specimens thin and porcellanous, in adults covered 

 with sand grains; aperture composed of numerous pores or radiate, 

 often indistinct. 



Length, up to 2.5 mm. 



Distribution. — From the known records of this species it is clearly 

 one of warm shallow waters, especially characteristic of coral reefs. 

 The only published record for the North Pacific is that given by 

 Brady in the Challenger Report, coral reefs of Honolulu, Hawaiian 

 Islands, in 40 fathoms. I have found the species fairly common in 

 shallow-water material from Gaspar Straits, the largest fully 2.5 mm. 

 in length, and from Apra Bay, Guam. 



The relation of this species to others of the genus is not entirely 

 apparent. The aperture is rather different from the typical Quin- 

 queloculina, being usually cribrate, like Hauerina. A few other spe- 

 cies, however, have this character. In some specimens the arrange- 

 ment is quinqueloculine, but in the very largest ones this is somewhat 

 obscured by the fact that the width of the chambers does not increase 

 correspondingly with the length, and as a result the earlier chambers 

 are left exposed and more than five chambers are visible. The speci- 

 mens in the material I have had have often been worn or broken, 

 and excellent material for detailed study has been rare. 



QUINQUELOCULINA AGGLUTINATA, new species. 

 Plate 9, fig. 2. 



Description. — Test free, five visible chambers in the adult, wall on 

 the exterior made up of agglutinated sand grains, with a smoothly 

 finished exterior, chambers somewhat angled, the angles rounded, 

 outer margin slightly convex, chambers broadest toward the base, 

 tapering slightly toward the apertural end, neck not distinctly 

 developed, flush with the base of the preceding chamber, aperture 

 oval, with a simple flattened tooth, rather broad, with truncate or 

 slightly rounded at the outer end. 



Length, 0.60 to 0.90 mm. 



Distribution. — Type-specimen Cat. No. 9158, U.S.N.M., and para- 

 types, all from a single station, full data not given, the material 

 simply marked "Off Alaska." The species reminds one somewhat 

 of Q bidentata of d'Orbigny, but the apertural characters in all the 

 specimens examined were very constant and decidedly different from 

 that species. Perhaps it most resembles the subarctic form figured 

 by Goes x under the name Miliolina agglutinins. 



i Kongl. Svensk. Vet. Akad. Handlingar, vol. 25, 1S94, pi. 19, figs. 848i-l. 



