464 
THE VOYAGE OF H.M.S. CHALLENGER. 
Lagena acuticosta, Reuss (PL LVII. figs. 31, 32; PL LYIII. figs. 20 (?) 21). 
Lagena acuticosta, Reuss, 1861, Sitzungsb. d. k. Ak. Wiss. Wien, vol. xliv. p. 305, pi. i. fig. 4. 
,, ,, Id. 1862, Ibid. vol. xlvi. p. 331, pi. v. fig. 63. 
,, ,, Id. 1870, Ibid. vol. lxii. p. 467, No. 10; — 
Scblicht 1870, Eoram. Pietzpuhl, pi. iii. figs. 17, 23. 
A variety distinguished from the typical Lagena sulcata by having comparatively 
few, thin, much elevated costae, frequently of unequal size. . 
The best recent examples of Lagena acuticosta are chiefly from deep water in the 
North and South Pacific ; but it would be almost impossible to lay down any lines of dis- 
tribution distinct from those of Lagena sulcata. 
Reuss figures a specimen from the Chalk of Maestricht, and Schlicht two or three from 
the Septaria-clay of Pietzpuhl. 
Lagena gracilis , Williamson (Pl. LYIII. figs. 2, 3, 7-10, 19, 22-24). 
Lagena gracilis, Williamson, 1848, Ann. and Mag. Nat. Hist., ser. 2, vol. i. p. 13, pl. i. figs. 3, 4. 
„ vulgaris, var. gracilis, Id. 1858, Rec. Eor. Gt. Br., p. 7, pl. i. figs. 12, 13. 
,, gracilis, Reuss, 1862, Sitzungsb. d. k. Ak. Wiss. Wien, vol. xlvi. p. 331, pl. iv. figs. 
58-61 ; pl. v. fig. 62. 
,, ,, Siddall, 1879, Catal. Brit. Rec. For., p. 5. 
This is the striate or finely costate modification of Lagena clavata. The test 
is much elongated, tapering to a point at the base, and finishing at the anterior end in 
a tubular neck. 
The geographical distribution of Lagena gracilis is world- wide. It is a not uncommon 
shallow-water Foraminifer on the western shores of Europe, but the Challenger specimens 
are chiefly from deep bottoms in the southern hemisphere : — from the South Atlantic, 
1900 to 2775 fathoms ; the Southern Ocean, 50 to 2600 fathoms; and the South Pacific, 
129 to 2425 fathoms. 
Its range in time embraces the Chalk of Riigen (Marsson), the Septaria-clay of 
Pietzpuhl (Reuss, Schlicht), the Pliocene of Calabria (Seguenza), and of Kar Nicobar 
(Schwager), and the Post-pliocene of Norway (Crosskey and Robertson), and of the north- 
east of Ireland (Wright). 
Lagena quadralata, H. B. Brady (Pl. LXI. fig. 3, a.b.). 
Lagena quadralata, Brady, 1881, Quart. Journ. Micr. Sci., vol. xxi., N. S., p. 62. 
Test flask-shaped, ectosolenian ; furnished with four equidistant, broad, tubulated, 
Li m cl b f orm wings, reaching from near the extremity of the neck to the base of the shell ; 
