FORAMINIFEEA OF THE ATLANTIC OCEAN. 61 



nbove the upper edge of the chamber, and is furnished with a curved 

 'attached entosolenian tube which j-uns down the wall of the tost on 

 the inner side of the shell, i. e. that opposed to the convex side. 



"Average breadth across wing, 0.08-0.15 mm.; average length 

 across wing, 0.10-0.20 mm. ; average length of chamber, 0.08-0.15 

 mm.: average breadth of chamber, 0.07-0.14 mm. 



" This little form, though very distinctive in appearance, is difficult 

 to describe ; but it may be compared to a human finger nail detached 

 from the flesh and with a little cyst growing upon its concave 

 surface. It is, no doubt, closely allied to L. marginata and Mr. 

 Wright's var. inaeqidlateralis of that species, but can not be confused 

 with either of these. Its nearest affinity appears to be L. irregularvi 

 Sidebottom, which closely resembles our species in the relation of the 

 chamber to the surrounding carina, but has a bicarinate periphery 

 and differs also from ours in the position of its aperture, which is 

 situated between the two keels. 



" The species occurs in many of the Goldseeker dredgings in the 

 North Sea and round the Scottish coast and is quite distinctive in its 

 appearance." 



The above is the original description and notes of Heron-Allen 

 find Earland on this species. They also recorded it as very rare off 

 South Cornwall. 



LAGENA WILLIAMSONI (Alcock). 



Plate 11, figs. 8, 9. 



Entosolenia wilUamsoni Alcock, Proc. Lit. Philos. Soc, vol. 4, 1865, p. 193. 



Lagena uHlUamsoni Wright. Proc. Belfast Nat. Field Club, 1876-7, App. 

 4, p. 104, pi. 4, fig. 14. — Balkwill and Weight, Proc. Roy. Irish Acad., 

 ser. 2, vol. 3, 1882, p. 547 ; Trans. Roy. Irisli Acad., vol. 28. 1885, p. 339, 

 pi. 14, figs. 6-8.— H. B. Brady, Journ. Roy. Micr. Soc, 1887, p. 903.— 

 Wright, Proc. Roy. Irish Acad., ser. 3, vol. 1, 1891, p. 479. — Robertson, 

 Proc. Nat. Hist. Soc. Glasgow, pt. 3, 1892, p. 241.— Goes, Kongl. Svensk. 

 Vet. Akad. Handl., vol. 25, No. 9, 1894, p. 79.— Wright, Irish Nat., vol. 

 9, No. 3, 1900, p. 54. — Earland, Journ. Quekett Micr. Club, ser. 2, vol. 

 9, No. 57, 1905, p. 212. — Balkwill and Millett, Rec. Forani. Galway, 

 1908, p. 5. — Heeon-Allen and Earland, Journ. Roy. Micr. Soc, 1909, 

 p. 424; Proc. Roy. Irish Acad., vol. 31, pt. 64, 1913, p. 80; Trans. Linn. 

 Soc. London, ser. 2, vol. 11, 1916, p. 247; Journ. Roy. Micr. Soc, 1916, 

 p. 45. 



DescHption. — Test somewhat pyriform, circular in transverse sec- 

 tion, basal end broadly rounded, apertural end somewhat extended; 

 surface ornamented by numerous longitudinal costae, 14-18 in num- 

 ber, the upper portion of these coalescing and forming a collar made 

 up of a reticulate network below the aperture; aperture rounded, 

 sometimes with a slight lip. 



Length up to 0.50 mm. 



