NOTES ON RETICULARIAN RHIZOPODA. 57 
out figures; of Bolivina the following new forms may be 
placed on record. 
Bolivina porrecta, nov.—Test elongate, straight, slightly 
tapering, finger-shaped, somewhat compressed ; margin 
and ends rounded. Segments about as broad as long, 
the earlier ones arranged on the normal Textularian 
plan, the later ones taking a nearly triangular form, 
each extending the entire width of the test, the sutures 
forming a zigzag line from side to side. Walls thin 
and clear, very finely perforated; sutural depressions 
bia slight. Aperture large, terminal, oblique. Length, 
i= Inch “(0-9 mm.). 
B. limbata, nov.—Test elongate, tapering, compressed, more 
or less twisted; margin angular or only slightly 
rounded, sinuate. Sutures irregularly curved, limbate, 
especially near the points of contact of the two series of 
segments on both faces of the shell. Length, ;> inch, 
(0°75 mm.). 
B. tenuis, nov.—Test thin, outspread, broadly elliptical, 
slightly convex on both sides ; margin acute. Segments 
few, each with a sort of supplementary lobe, the lobes 
collectively presenting the appearance of a series of 
chamberlets down the median line. Aperture on the 
oblique face of the terminal chamber surrounded by 
radiating lines. Dimensions, ~, by ;4, inch (0°3 by 
0:26 mm.). 
B. laevigata, nov.—Test elongate, thin, complanate, broadest 
at the centre, tapering and rounded towards the ends. 
Segments few in number, Textularian in arrangement, 
broad, flattened on both faces, bordered both at sutures 
and periphery by a narrow band of clear shell-substance. 
Sutures flush; aperture large, irregularly oval, oblique. 
Length, 4, inch (0°43 mm.). 
B. tortuosa, nov.—Test elongate, tapering, broadest near the 
top; the sides bent obliquely towards the median line, 
so as to give the whole shell a twisted contour ; margin 
thin, sharp, lobulate. Segments numerous, long, narrow, 
projecting and rounded at the free ends. Sheil conspi- 
cuously perforated. Length, 3, inch (0°45 mm.). 
B. pygmea, nov.—Test short, broad, biconvex, widest near 
the top, and tapering to a point at the base. Segments 
numerous, somewhat inflated, the peripheral ends ex- 
tended into sharp points directed obliquely or horizon- 
tally. Length, =+, inch (0°25 mm.). 
B. robusta, nov.—Test elongate, compressed, broad and 
rounded at the superior extremity, tapering to a point, 
