TROPICAL PACIFIC FORAMINIFERA OF "ALBATROSS" 27 



LAGENA ORBIGNYANA (Seguenza) var. LACUNATA Burrows and Holland 



Plate 7, Figures 1-5, 8 



Lagena castrensis H. B. Brady (not Schwager), Rep. Voy. Challenger, Zoology, 



vol. 9, p. 485, pi. 60, figs. 1, 2, 1884. — Balkwill and Wright, Trans. Roy. 



Irish Acad., vol. 28 (Sci.), p. 341, pi. 12, figs. 20, 21, 1886.— Egger, Abh. 



kon. bay. Akad. Wiss. Munchen, CI. ii, vol. 18, p. 333, pi. 10, figs. 71, 72, 



1893.— Flint, U. S. Nat. Mus. Rep. for 1897, p. 308, pi. 54, fig. 5, 1899. 

 Lagena lacunata Burrows and Holland, in Jones, Paleont. Soc, 1895, p. 206, 



pi. 7, fig. 12. 

 Lagena orhignyana var. castrensis Millett, Journ. Roy. Micr. Soc, 1901, p. 626, 



pi. 14, fig. 20. 

 Lagena orhignyana var. lacunata Sidebottom, Mem. Proc. Manchester Lit. 



Philos. Soc, vol. 54, no. 16, p. 19, pi. 2, fig. 14, 1910; Journ. Quekett Micr. 



Club, vol. 11, p. 416, pi. 19, figs. 16-18, 1912.— Cushman, U. S. Nat. Mus. 



Bull. 71, pt. 3, p. 43, pi. 20, fig. 1, 1913; Florida State Geol. Surv. BuU. 4, 



p. 32, pi. 5, figs. 13a, h, 1930. 



Test rounded or ovate, much compressed, whole test surrounded 

 by a peripheral keel inside of which on each side is a complete raised 

 rim about the body proper, neck somewhat elongate; wall with the 

 body portion ornamented by a network of lacunae or pitted areas 

 of varying size usually with an outlining ring about each pit. Length, 

 0.25 mm; breadth, 0.18 mm; thickness, 0.08 mm. 



Our specimens show a great range of variation, from specimens 

 with distinct, somewhat rounded pits, to irregular ones becoming 

 polygonal, these merging into specimens with an irregular hexagonal 

 network, and portions of the test in some cases becoming longi- 

 tudinally costate. There seems to be no distinction between these 

 various gradations, and all are assigned to Burrows and Holland's 

 variety that seems to be a very ^videly distributed one. Most of the 

 records for the variety in oiu- material are from comparatively shallow 

 water in Levuka, Fiji; near Nairai, Fiji, in 12 fathoms; and Makemo 

 Lagoon. In addition the variety has occurred at three Albatross 

 stations, data for which are given in Table 17. 



Table 17. — Lagena orhignyana var. lacunata — material examined 



155091—33- 



