EEPOET ON THE FOEAMINIFEEA. 
479 
Lcigena lagenuides, Williamson, sp. (PI. LX. figs. 6, 7, 9, 12-14). 
Entosolenia marginata, var. lagenoides, Williamson, jl 85 8, Eec. Eor. Gt. Br., p. 11, pi. i. figs. 25. 26. 
Lcigena lagenoides, Eeuss, 1862, Sitzungsb. d. k. Ak. Wiss. Wien, vol. xlvi. p. 324, pi. ii. 
figs. 27, 28. 
Fissurina reussiana, Seguenza, 1862, Foram. Monotal. Mess., p. 69, pi. ii. fig. 40. 
„ radiata, Id. Ibid. p. 70, pi. ii. fig. 42. 
Lagena tubulifera, Brady, 1881, Quart. Journ. Micr. Sci., vol. xxi., N. S., p. 61. 
Amended characters — Test oval or pyriform, biconvex ; with long ectosolenian neck, 
which is sometimes continued into the cavity of the shell as an entosolenian tube ; 
periphery furnished "with a laminar wing of variable width, traversed by conspicuous, 
parallel or radiating tubuli. Length of large specimens nearly -\ytli inch (0'5 mm.). 
At first sight it is difficult to identify the deep-sea examples of this form, which for 
the most part are characterised by a broad and conspicuously tubulated wing, by 
reference to Williamson’s modest drawings ; neither does his accompanying description, 
which misses the salient features of the fully developed shell, afford much assistance. The 
variability of the wing both in width and thickness, as well as in the character of the 
tubulation, is illustrated to some extent by the figures in PL LX. 
Minute specimens of Lagena lagenoides are not unfrequent on the shores of the 
British Islands, but it is most familiar as a mid- Atlantic species. Notes have been kept 
of its occurrence at five Stations in the North Atlantic, the depths ranging from 767 
fathoms to 2740 fathoms, and at five Stations in the South Atlantic, 675 to 
1990 fathoms. It has also been found in comparatively shallow water at three Stations 
in the South Pacific, 38 to 410 fathoms. 
It is figured by Seguenza from specimens obtained in the Miocene deposits of Sicily, 
and has been found by Mr. Wright in the Post-tertiary deposits of the north-east of 
Ireland, but is not otherwise known as a fossil species. 
Lagena lagenoides, var. tenuistriata, H. B. Brady (PL LX. figs. 11, 15, 16). 
Lagena tubulifera, var. tenuistriata, Brady, 1881, Quart. Journ. Micr. Sci., vol. xxi., N. S., 
p. 61. 
Morphological characters similar to those of Lagena lagenoides ; the body of the shell 
ornamented with delicate longitudinal striae. 
The striate variety of the last-described species occurs in the North Atlantic, south 
of the Eockall Bank, 630 fathoms ; at one Station in the South Atlantic, mid-ocean, 1990 
fathoms ; and elsewhere, in company with the typical form. 
