FOEAMINIFEKA OF THE ATLANTIC OCEAN 33 



Vet. Akad. Handl., vol. 25, No. 9, 1894, p. 113, pi. 21, figs. 860- 

 861e. — Chapman, Proc. Zool. Soc. London, 1895, p. 10. — Jones, Foram. 

 Crag., pt. 2, 1895, p. 122, pi. 3, figs. 41, 42.— A. Silvestri, Atti. Accad. 

 Sci. Acireale, vol. 7, 1895-96, p. 37. — Sidebottom, Mem. Proc. Manchester 

 Lit. Philos. Soc, vol. 48, No. 5, 1904, p. 14, pi. 4, figs. 13, 14.— Earland, 

 Journ. Quekett Micr. Club, ser. 2, vol. 9, 1905, p. 196. — Heron-Allen 

 and Earland, Journ. Roy. Micr. Soc, 1909, p. 313. — Sidebottom, Mem. 

 Proc Manchester Lit. Philos. Soc, vol. 54, No. 16, 1910, p. 5. — Heron- 

 Allen and Earland, vol. 31, pt. 64, 1913, p. 32, pi. 2, figs. 5, 6; Trans. 

 Linn. Soc. London, vol. 11, ser. 2, 1916, p. 214; Bull. Soc. Sci. Hist. Nat. 

 Corse, 1922, p. 122; Trans. Zool. Soc London, vol. 22, 1926, p. 69 (list). 

 Quinqueloculina bicornis H. B. Brady, Trans. Linn. Soc. Zool., vol. 24, 1864, 

 p. 472 (table); Nat. Hist. Trans. Northumberland and Durham, vol. 1, 

 1865 (1867), p. 94; Ann. Mag. Nat. Hist., ser. 4, vol. 6, 1870, p. 49.— 

 Terquem, Ess. Anim. Plage Dunkerque, pt. 1, 1875, p. 39, pi. 6, figs. 6 

 a-c. — KiAR, Rep't Norwegian Fish and Mar. Invest., vol. 1, No. 7, 1900, 

 p. 28. 



Test quinqueloculine, slightly longer than broad, periphery broadly 

 rounded; chambers distinct, somewhat contorted, and sinuous; sutures 

 distinct only slightly depressed ; wall costate especially on the periph- 

 eral portion of each chamber, sides partially smooth; aperature 

 elongate, more or less quadrate in the adult, only slightly projecting, 

 the edges with a slight rim and a single simple tooth. 



Length up to 1 mm.; breadth up to 0.70 mm.; thickness up to 

 0.50 mm. 



This species seems to be very common in the Eastern Atlantic 

 about the British Isles, off the coast of Europe and in the Mediterra- 

 nean. There are numerous records of its occurrence elsewhere but 

 the specimens are evidently not the same. For this reason numerous 

 references are left out and only those given which it seems refer to 

 the species originally described by Walker and Jacob. 



The species is close to Quinqueloculina undulata d"Orbigny as fig- 

 ured by Schlumberger. 



Variety angulata Williamson (pi. 6, figs. 3, 4) is a form in which the 

 peripheral angles of the chambers are much thickened, each forming 

 a rounded costa. In a form called var. elegans by WiUiamson (pi. 6, 

 fig. 5) the periphery is very rounded. 



QUINQUELOCULINA SEMINUDA Reuss 



Plate 6, Figures 6 a-c 



Heron-Allen and Earland ^ record this species from the Clare Island 

 region of Ireland. 



" This species, in which the peripheral margin of the chambers is 

 decorated with a varying number of longitudinal striae, is generally 

 distributed over the area (23 stations), but is never very abundant. 

 The strength of the peripheral marking is very variable, in some cases 



J Proc. Roy. Irish Acad., vol. 31, pt. 64, 1913, p. 27. 



