REPORT OjST THE FORAMHSTIEERA. 
293 
It is a somewhat rare form, and appears to be peculiar to deep water. Specimens 
occur at five “ Porcupine ” Stations in the North Atlantic, west and south of Ireland, 800 
to 2435 fathoms ; at one Challenger Station off the west coast of Africa, 1750 fathoms ; 
at two in the South Atlantic, 1900 fathoms and 2350 fathoms respectively ; at four 
in the South Pacific, 400 to 1425 fathoms ; and at one in the North Pacific, 2350 
fathoms. 
Reophax dentaliniformis, H. B. Brady (PI. XXX. figs. 21, 22). 
Reophax dentaliniformis, Brady, 1881, Quart. Journ. Micr. Sei., vol. xxi., U. S., p. 49. 
Test long, slender, cylindrical, tapering ; straight or more or less bent ; composed of 
several (usually 5 or 6) elongate, slightly ventricose segments. Texture somewhat 
coarsely arenaceous, but neatly cemented and not very rough externally. Aperture 
produced, often forming a short wide tubular neck. Length, about -j-^th inch (P85 mm.). 
Under this name the Dentcdina- like modifications of Reophax scorpiurus have been 
grouped together. Such specimens are generally very easily distinguished from the type 
by their slender proportions and regular contour, as well as by the lighter colour of the test. 
Reophax dentaliniformis is widely distributed, though it is by no means a common 
variety. It occurs in all the great oceans, but is very rare in the South Atlantic. like 
Reopliax pilulifera, its home is on deep sea-bottoms, and out of twenty-one Stations at 
which its presence has been noted, only four have a depth of less than 1000 fathoms, 
whilst seven are above 2000, and two above 3000 fathoms. 
Reophax bacillaris, Brady (PI. XXX. figs. 23, 24). 
Reopliax bacillaris , Brady, 1881, Quart. Journ. Micr. Sci., vol. xxi., FT. S., p. 49. 
Test long, cylindrical, regularly tapering, somewhat bent ; composed of a large 
number of short segments. Earlier segments cylindrical, with flush sutures not dis- 
tinguishable on the exterior ; later ones subspherical. Aperture central, simple. Colour 
dark grey. Length, about -jtth inch (4 - 2 mm.) more or less. 
This is a rare species, and may be distinguished by its numerous segments and the 
dark grey hue of the test. It was obtained both by Dr. Carpenter and the Eev. A. M. 
Norman from one of the “Valorous” soundings in the North Atlantic, — No. 8, lat. 
59° 10' N., long. 50° 25'; W. ; depth, 1750 fathoms; and I am indebted to them for 
the specimens from which the drawings, figs. 23, 24, have been taken. Some broken 
tests belonging to the same species were found in one of the “ Porcupine ” dredgings, 
south of Rockall Bank, 420 fathoms, and at one of the Challenger Stations on the 
north coast of Papua, 1070 fathoms; but all of them inferior to the foregoing in point 
of size and distinctiveness. 
(ZOOL. CHALL. EXP. — PART XXII. 1883.) 
Y 38 
