FORAMINIFERA.OF NORTH PACIFIC OCEAN. 79 



Genus MARGINUL1NA d'Orbigny, 1826. 



Marginulina d'Orbigny, Ann. Sci. Nat., vol. 7, 1826, p. 258 (type, M. glabra 

 d'Orbigny). — H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, 

 p. 526. 



Description. — Test subcylindrical, early portion close coiled, later 

 chambers uncoiled, rounded in transverse section, last formed 

 chambers often inflated; aperture in early chambers marginal, later 

 often becoming nearly median, usually radiate. 



This genus is not well characterized, and the limits between it and 

 the much uncoiled species of Cristellaria are not at all well denned. 



MARGINULINA GLABRA d'Orbigny. 

 Plate 23, fig. 3. 



Marginulina glabra d'Orbigny, Ann. Sci. Nat., vol. 7, 1826, p. 259, No. 6; 

 Modeles, No. 55. — Parker, Jones, and H. B. Brady, Ann. Mag. Nat. Hist., 

 eer. 3, vol. 16, 1865, p. 27, pi. 1, fig. 36.— H. B. Brady, Rep. Voy. Challenger, 

 Zoology, vol. 9, 1884, p. 527, pi. 65, figs. 5, 6. — Balkwill and Wright, 

 Trans. Roy. Irish. Acad., vol. 28 (Sci.), 1885, p. 344, pi. 12, figs. 24, 25.— 

 Egger, Abh. kon. bay. Akad. Wiss.Munchen, CI. n, vol. 18, 1893, p. 346, 

 pi. 11, figs. 28, 29.— Flint, Rep. U. S. Nat. Mus., 1897 (1899), p. 313, pi. 60, 

 fig.l. 



Vaginulina glabra Goes, Bull. Mus. Comp. Zool., vol. 29, 1896, p. 59. 



Description. — Test short, stout, early chambers close coiled, 

 later ones uncoiled, subcylindrical, inflated, sutures depressed, 

 surface smooth; aperture usually radiate. 



Length up to 2.5 mm. 



Distribution. — Brady records this species from two Challenger 

 stations in the North Pacific off Japan in 345 and 2,150 fathoms. 

 Goes records it from Albatross station D3376 in 1,132 fathoms off 

 the west coast of America. I have found it but very rarely in the 

 material I have examined. 



MARGINULINA STRIATULA, new species. 

 Plate 23, fig. 4. 



Description. — Test elongate, early part forming a portion of a coil, 

 later chambers moniliform, tumid, separated by deep constrictions; 

 wall with numerous very fine longitudinal striae; aperture at the end 

 of a well developed neck, four-radiate. 



Length nearly 2 mm. 



Type-specimen.— -Cat. No. 8549, U.S.N.M., from Nero station 2071 

 in 271 fathoms off the Hawaiian Islands. 



The finely striate surface and the apertural characters will easily 

 distinguish the species. 



