er 
NOTES ON RETICULARIAN RHIZOPODA, 55 
sutures marked by external limbate lines; chamber 
cavities much subdivided. Aperture central, terminal, 
with raised valvular lip. Length, 5 inch (2°5 mm.). 
C. indiscreta, nov.—Test elongate, three-sided, broad near 
the middle, and tapering towards both ends; edges 
rounded, except near the inferior end, where they are 
acute, and terminate in a point. Segments few, septi- 
tion obscure externally. ‘Texture subarenaceous, com- 
pact; surface smooth. Aperture a neat, round terminal 
orifice. Length, ~; inch (1°6 mm.). 
Triraxta, Reuss. 
Tritaxia lepida, nov.—Test triquetrous, broadest near the 
middle, tapering towards the ends; the three sides 
nearly equal, the angles sharp or subcarinate. Superior 
end rounded and terminating in a short neck; inferior, 
tapering to a sharp point. Texture hyaline. Length 
=5 inch (0°3 mm.). 
Buuimrina, d Orbigny. 
Bulimina subteres, nov.—This name has been given to a 
small Bulimine form frequent in northern seas, but which 
hitherto has had no well-defined position. In my paper 
on North Polar Rhizopoda (‘Ann. and Mag. Nat. Hist.,’ 
ser. 5, vol. i, p. 436, pl. 21, fig. 12) it was provisionally 
assigned to B. elegantissima, d’Orb., with the remark 
that the specimens were “ not of the precise contour by 
which the species was usually recognised ;” and that 
though “the segments were similarly arranged, they 
were relatively shorter, and there were fewer in each 
convolution.” It might have been added that the aper- 
ture is usually inserted further from the apex of the 
shell. In point of fact the species is almost equall 
related to B. elegantissima, d’Orb., and B. (Robertina) 
arctica, @ Orb., but it has larger, broader segments than 
either, and is altogether less elegantly made. Speci- 
mens from the North Atlantic are commonly from =, 
to =; inch (0-4 mm. to 0°6 mm.) in length, broad and 
rounded at the superior end, and tapering to a point; 
the sides are convex and but slightly excavated at the 
sutural lines. 
Messrs. Parker and Jones (‘ Phil. Trans.,’ vol. elv, 
p- 375) show that the two d’Orbignian forms above 
mentioned are in near relationship, but I cannot 
follow them so far as to include both under the same 
name; indeed, I should prefer to assign some of the 
