FORAMINIFEKA OF THE NORTH PACIFIC OCEAN. 57 



MASSILINA SECANS (d'Orbigny). 



Quiqueloculina secans d'Orbigny, Ann. Sci. Nat., vol. 7, 1826, p. 303, No. 43. — 



Parker, Jones, and Brady, Ann. Mag. Nat. Hist., ser. 3, vol. 16, 1865, 



p. 34, pi. 1, fig. 10. 

 Miliolina secans H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 167, 



pi. 6, figs. 1, 2. — Sherborn and Chapman, Journ. Roy. Micr. Soc, 1886, 



p. 742, pi. 14, fig. 4.— Goes, Kongl. Svensk. Vet.-Akad. Ilandl., vol. 25, 



1894, p. 112, pi. 20, fig. 856. 

 Massilina secans Schlumberger, Mem. Soc. Zool. France, 1893, p. 218, text 



figs. 31-34, pi. 4, figs. 82, 83— Millett, Journ. Roy. Micr. Soc, 1898, p. 608, 



pi. 13, fig. 3. 



Description. — Test in its early development quinqueloculine, 

 smooth, ovoid in shape, in the adult becoming broader, subcircular, 

 relatively more compressed, the adult chambers often transversely 

 plicated or granular, the periphery of the last-formed one often 

 denticulate; aperture elongate, narrow, with a single tooth, bifid at 

 the tip. 



Length, up to 1 mm. 



Distribution. — Brady records this species from a single North 

 Pacific station, Challenger 260A, Honolulu coral reefs, Hawaiian 

 Islands, in 40 fathoms. 



MASSILINA ANNECTENS Schlumberger. 

 Plate 20, fig. 3. 

 Massilina annectens Schlumberger, Mem. Soc. Zool. France, 1893, p. 220, text 

 figs. 35-37, pi. 3, figs. 77-79. — Sidebottom, Mem. Proc. Manchester Lit. and 

 Philos. Soc, vol. 48, pt. 2, No. 5, 1904, p. 18, pi. 5, figs. 2-4. 



Description. — Test broad, often broader than long, chambers 

 quadrangular in section, periphery flattened or slightly concave, 

 smooth except for occasional sand grains embedded in the wall, 

 making the wall more or less roughened in spots; aperture rounded, 

 with a single bifid tooth. 



Length, about 0.8 mm. 



Distribution. — The only North Pacific material I have had is from 

 Nero station 2039, in 24 fathoms, off the Hawaiian Islands. 



MASSILINA CRENATA Karrer. 

 Plate 20, fig. 2. 

 Spiroloculina crenata Karrer, Sitz. Akad. Wiss. Wien, vol. 57, 1868, p. 135, 

 pi. 1, fig. 9.— H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, 

 p. 156, pi. 10, figs. 24-26. — Egger, Abhandl. kong. bay. Akad. Wiss. Munchen, 

 CI. n, vol. 18, 1893, p. 225, pi. 1, figs. 42, 43. 



Description. — Test in its early development quinqueloculine, adult 

 chambers in a single plane, in front view subelliptical, nearly as 

 broad as long, compressed; chambers long and narrow, margin 

 crenulate, due to the regular contractions or plications of the chamber 

 in the adult; aperture rounded. 



Length, up to 0.60 mm. 



53709°— Bull. 71, pt. 6—17 5 



