28 BULLETIN 161, UNITED STATES NATIONAL MUSEUM 



LAGENA ORBIGNYANA (Seguenza) var. CLATHRATA H. B. Brady 



Plate 7, Figures 6, 7 



Lagena dathrata H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, p. 484, 

 pi. 60, fig. 4, 1884. — Balkwill and Millett, Journ. Micr., vol. 3, p. 82, 

 pi. 2, fig. 14; pi. 4, fig. 3, 1884. — Heron-Allen and Earland, Proc. Roy. 

 Irish Acad., vol. 31, pt. 64, p. 90, pi. 7, fig. 10, 1913; Trans. Zool. Soc. London, 

 vol. 20, p. 668, 1915; Trans. Linn. Soc. London, ser. 2, vol. 11, p. 254, 1916; 

 British Antarctic Exped., Zoology, vol. 6, p. 165, 1922; Journ. Linn. Soc. 

 Zool., vol. 35, p. 624, 1924. 



Lagena orbignyana var. dathrata Millett, Journ. Roy. Micr. Soc, 1901, p. 628, 

 pi. 14, fig. 23. — SiDEBOTTOM, Joum. Quekett Micr. Club, vol. 11, p. 418, 

 1912.— Cushman, U. S. Nat. Mus. Bull. 71, pt. 3, p. 44, pi. 11, fig. 4, 1913; 

 U. S. Nat. Mus. Bull. 104, pt. 4, p. 42, pi. 8, fig. 5, 1923.— Yabe and 

 Hanzawa, Jap. Journ. Geol. Pal., vol. 4, p. 50, 1925 (1926). 



Variety differing from the typical in the ornamentation of the body 

 of the test which has numerous longitudinal costae. Length, up to 

 0.4 mm; breadth, 0.25 mm; thickness, 0.15 mm. 



This form described by Brady shows some variation in the degree 

 of ornamentation, especially in the number and coarseness of the 

 costae. It has been widely recorded, but seems to exist in its t^^^pical 

 form only in the Indo-Pacific. Our specimens are from the two 

 Albatross stations noted in Table 18. 



Table 18. — Lagena orbignyana var. dathrata — material examined 



LAGENA YOKOYAMAE Millett 



Plate 6, Figures 13a, b 



Lagena yokoyamae Millett, Trans. Geol. Soc. Cornwall, vol. 11, p. 657, 1894. 

 Lagena orbignyana (Seguenza) var. yokoyamae Heron-Allen and Earland, 

 British Antarctic Exped., Zoology, vol. 6, p. 163, pi. 6, figs. 17, 18, 1922. 



Millett gave the above name to a species from the Pliocene of St. 

 Erth, Cornwall, England, but gave no figures, Heron-Allen and 

 Earland, by comparison of their New Zealand specimens with an orig- 

 inal drawing of Millett, now in their possession, have been able to iden- 

 tify and figure this variety. The specimen figured here evidently is close 

 to this variety, and should be included under Millett's name. It is 

 from Albatross Station H3961, center south coast of Tarawa, 10 miles 



