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THE VOYAGE OE H.M.S. CHALLENGER. 
transversely ; sutures flush externally. Walls thin, hyaline, perforate. Length, xoryth 
inch (0‘25 mm.). 
This is a very minute and delicate species, with clear shell and rounded outline, often 
bearing considerable resemblance to a small trochoid Rotalian. 
It is, moreover, exceedingly rare, and hitherto has only been noticed at three 
Challenger Stations, all in the Pacific, namely : — off East Moncoeur Island, Bass Straits, 
38 fathoms ; Nares Harbour, Admiralty Islands, 17 fathoms .; and the TTyalonema- ground 
south of Japan, 345 fathoms. 
Textularia jugosa, n. sp. (Pl. XLII. fig. 7, a.b.). 
Test oblong, tapering, compressed ; oral end elliptical, truncate ; aboral extremity 
subangular or rounded. Segments numerous, 6 to 10 in each series; sutures marked 
externally by stout raised bands of clear shell-substance. Length, ^yth inch (0'5 mm.). 
D’Orbigny has figured a specimen to all appearance belonging to this species 
(Foram. Canaries, pl. i. figs. 19-21), under the name Textularia sagittula; and it is 
difficult to account for the apparent confusion of two forms so entirely distinct. 
Textularia jugosa is a well-marked species, but from its minute size, specimens may easily 
be overlooked amongst other Foraminifera. 
It has only been observed at one Challenger Station, off Raine Island, Torres Strait, 
155 fathoms, and in that locality the shells seldom attain a length of more than -g’yth 
inch (0'3 mm.). Its occurrence has been noted in the Gulf of Suez, 15 to 20 fathoms; 
in Curteis Strait, Queensland ; and in shore-sand obtained on the east coast of 
Madagascar ; in the last-named district the examples are numerous and of comparatively 
large dimensions. 
Textularia quadrilatera, Sch wager (Pl. XLII. figs. 8-12). 
Textilaria quadrilatera, Sell wager, 1866, Novara-Exped., Geol. Theil., vol. ii. p. 253, pl. vii. 
fig. 103. 
This striking form is excellently figured by Schwager in his memoir on fossil 
Foraminifera from Kar Nicobar. It has a long, slender, tapering test, often terminating 
in a stout spine, compressed and quadrilateral, the four angles frequently carinate, and 
the walls hyaline and generally distinctly perforate. The shape of the aperture varies 
a good deal, and in the majority of recent specimens it resembles that of Bolivina rather 
than Textularia ; but in many cases it has the simple arched character shown in the 
original figure, and I have therefore left the generic position of the species unaltered. 
