TROPICAL PACIFIC FORAMINIFERA OF "ALBATROSS" 



19 



LAGENA MARGINATO-PERFORATA Seguenza 



Plate 4, Figures 13a, b; Plate 5, Figures la, b; Plate 6, Figures la, b 



Lagena marginato-perforata Seguenza, Atti Accad. Lincel, ser. 3, vol. 6, 

 p. 332, pi. 17, fig. 34, 1880. — Sidebottom, Mem. Proc. Manchester Lit. 

 Philos. Soc, vol. 50, no. 5, p. 10, pi. 2, fig. 5, 1906; vol. 54, no. 16, p. 18, 

 1910. — Heron-Allen and Earland, Proc. Roy. Irish Acad., vol. 31, pt. 

 64, p. 86, pi. 7, figs. 5, 6, 1913; Trans. Zool. Soc. London, vol. 20, p. 663, 1915; 

 Trans. Linn. Soc. London, ser. 2, vol. 11, p. 252, 1916; Journ. Roy. Micr. 

 Soc, 1916, p. 46.— Cushman, U. S. Nat. Mus. Bull. 104, pt. 4, p. 37, pi. 7, 

 fig. 4, 1923. — Heron-Allen and Earland, Journ. Roy. Micr. Soc, vol. 50, 

 p. 168, 1930.— Cushman, Florida State Geol. Surv. Bull. 4, p. 32, pi. 5, 

 fig. 12, 1930. 



Test somewhat compressed, oval, apertiiral end slightly projecting, 

 periphery somewhat keeled; wall of the test covered with numerous 

 pits of rather even size, and of more or less regular distribution. 

 Length, 0.3 mm; breadth, 0.18 mm; thickness, 0.1 mm. 



An examination of the literature will show that there are numerous 

 forms assigned to this species, some of which fit rather closely the 

 original figure given by Seguenza, and others are not at all like it. 

 The original figure has a somewhat compressed body with a distinct 

 keel, and the general body of the test has rather large, evenly dis- 

 tributed perforations. Such forms are figured here, and seem to have 

 a rather wide distribution. In shoal water the species occurs at the 

 anchorage off Guam, Ladrone Islands, 21 fathoms; Port Lotten, 

 Kersail, Caroline Islands; Rongelap Atoll, Marshall Islands; off 

 Levuka, Fiji; and at Viva Anchorage, Fiji. Table 10 gives the data 

 for the four Albatross stations from which the species was obtained. 



Table 10. — Lagena marginato-perforata — material examined 



LAGENA LAEVIS (Montagu) 



Plate 4, Figures 5a, b 



No attempt has been made to give a complete synonymy for this 

 species, as it has been used by many authors to include various types 

 of smooth Lagena. In its typical form it has a somewhat elongate 



