EEPOK.T ON THE FORAMINIFERA. 
291 
Test free, asymmetrical ; oblong, fusiform, or subcylindrical ; cavity either entire or 
spuriously divided by one or more incomplete transverse septa. Walls coarsely arena- 
ceous, rough externally ; aperture simple, terminal. Length, ^th inch (0’63 mm.) or 
more. 
This is a starved shallow-water variety of Reophax scorpiurus. The test is often, 
as described by Prof. Williamson, without internal septa, but more commonly is spuri- 
ously segmented near the inferior extremity, and consists in fact of a small chamber 
surmounted by one of much larger size. It can scarcely be distinguished except by 
comparative characters from poor specimens of the typical species. 
Reophax fusiformis is of somewhat restricted distribution. It is found in the Arctic 
Ocean as far north as lat. 78° 40' N. (Robertson, Brady), and at various points on our 
own shores, especially on the western coast of Scotland, at depths seldom exceeding 
40 or 50 fathoms. In the North Atlantic, west of Ireland, it has been met with at two 
of the “Porcupine” Stations, in much deeper water, 630 fathoms and 1443 fathoms 
respectively. The species only occurs at one Challenger Station, No. 209, Philippine 
Islands, 95 fathoms. 
Reophax scorpiurus, Montfort (PL XXX. figs. 12-17). 
“ Orthoceras ” ?, Soldani, 1795, Testaceographia, vol. i. pt. 3, p. 239, pi. clxii. fig. K. 
Reophax scorpiurus, Montfort. 1808, Conchyl. System., vol. i. p. 330, 8 3 e genre. 
Nodosaria (. Dentalina ) scorpionus, d’Orbigny, 1826, Ann. Sci. Nat., vol. vii. p. 255, No. 40. 
Lituola scorpiurus, Brady, 1864, Trans. Linn. Soc. Lond., vol. xxiv. p. 467, pi. xlviii. fig. 5. 
„ nautiloidea, var. scorpiurus, Parker and Jones, 1865, Phil. Trans., vol. civ. p. 407, pi. xv. 
fig. 48, a. b. 
Nodosaria agglutinans, Ter quern, 1870, Mem. Acad. Imp. Metz, 1869-70, p. 252, pi. xxix. 
fig. 18. 
Lituola scorpiurus, Parker, Jones, and Brady, 1871, Ann. and Mag. Nat. Hist., ser. 4, vol. viii. 
p. 159, pi. ix. fig. 29. 
Reophax scorpiurus, Siddall, 1879, Catal. Brit. Bee. For., p. 4. 
„ helvetica, Haeusler, 1883, Quart. Journ. Geol. Soc., vol. xxxix. p. 27, pi. ii. figs. 8-10. 
Test free ; consisting of several (usually 4 to 6) somewhat inflated segments, of 
irregular size and shape, usually increasing in size from the first to the last, joined together 
in a more or less curved or crooked line. Texture coarsely arenaceous, surface rough. 
Length very variable, J^th to jtth inch (0'5 to 4 mm.). 
The general contour and minuter characters of the test of Reophax scorpiurus depend 
in great measure upon the locality in which it is found. On sandy bottoms it gene- 
rally occurs in the rough condition represented in fig. 12; whilst in pure Globigerina 
ooze the siliceous grains are replaced by the empty shells of the smaller Foraminifera, 
which, cemented together, form a test such as that shown in fig. 13. In localities 
