FORAMINIFERA OF THE ATLANTIC OCEAN. 

 Lingulina seminuda — material examined. 



97 



LINGULINA BICARINATA Sidebottom. 



Plate 17, figs. 5-7 ; pi. IS, figs. 6, 7. 



Lingulina carinata D'Okbigny, var. bicarinata Sidebottom, Mem. Proc. Man- 

 chester Lit. Philos. Soc, vol. 51, no. 9, 1907, p. 3, pi. 1, fig. 20; vol. 54, 

 1910, p. 20. — Hebon-Allen and Eakland, Proc. Roy. Irish Acad., vol. 31, 

 pt. 64, 1913, p. 94, pi. 8, figs. 3, 4 ; Trans. Linn. Soc. London, ser. 2, vol. 

 11, 1916, p. 259, pi. 42, figs. 3-5. 



Description. — Test elongate, much compressed, composed of two or 

 three chambers, periphery of the test with two parallel keels ; cham- 

 bers distinct, slightly inflated; sutures slightly depressed, distinct; 

 wall smooth, thin, finely punctate; aperture elongate, terminal cen- 

 tral, between the keels which are much extended about the apertural 

 end. 



Length. 0.10-0.25 mm. 



DistHhution. — Sidebottom originally described this species as very 

 rare from the Mediterranean, from off the coast of the Island of 

 Delos, and from the Bay of Palermo, Sicily. Heron- Allen and Ear- 

 land record it from off the British Isles, in the Clare Island region, 

 from the west of Scotland, from off Noss Head, in the Moray Firth, 

 and at several other stations about the Scottish coast. I have seen 

 no material from the western Atlantic. 



This seems to be a true Lingulina, but does not seem closely enough 

 related to typical L. cannata D'Orbigny of the "West Indies to allow 

 its being placed as a varietj'^ of that species, and I have therefore given 

 it si^ecific rank. 



LINGULINA ARMATA Sidebottom. 



Plate 17, fig. 2. 



Liingulina armata Sidebottom, Mem. Proc. Manchester Lit. Philos. Soc, vol. 

 51, no. 9, 1907, p. 4, pi. 1, fig. 21. — Heron-Allen and Earland, Proc. Roy, 

 Irish Acad., vol. 31, pt. 64, 1913, p. 95, pi. 8, fig. 8. 



Description. — Test composed of two chambers, somewhat com- 

 pressed, the periphery of the initial chamber with a series of small 



