iy Sil 
NOTES ON RETICULARIAN RHIZOPODA, 49 
is impossible to say what length complete specimens 
may attain. The diameter is about +, inch (2°5 mm.). 
ReEopuHAx, de Montfort. 
Of the monothalamous and moniliform (Lagena-like and 
Nodosaria-like) Lituole there are half a dozen unrecorded 
modifications of sufficient interest to deserve preliminary 
notice. 
fteophax ampullacea, nov., is monothalamous and com- 
pressed. It bears very much the same relation to R. 
difflugiformis that Lagena marginata bears to L. glo- 
bosa. Length, ;5 inch (0°85 mm.). 
fh. bacillaris, nov., is a long, regularly tapering, slightly 
arcuate variety, with very numerous, short segments. 
The earlier segments are cylindrical, and have flush 
sutures not distinguishable on the exterior, the later ones 
sub-spherical. Colour very dark. Length sometimes 
nearly + inch (4°7 mm.). 
fi. rudis, nov.—The largest species of the subgenus hitherto 
met with. Shape long, cylindrical, slightly tapering ; 
sides even and unconstricted; extremities rounded. 
The walls thicker than those of its congeners and of 
looser texture ; composed of fine grey sand. A longi- 
tudinal section reveals about six segments, each taper- 
ing at the summit to a stoloniferous tube, the mouth of 
which, as well as the external orifice, is tinted reddish 
brown. Length, 4; inch (10° mm.) or more. 
The Rev. A. M. Norman has placed in my hands some 
specimens of a form which, though certainly distinct, is 
very difficult to separate from this by any positive characters, 
The specimens are of smaller size and relatively long and 
slender, darker in colour, and more compactly built; but 
neither they nor those of the larger species show any 
sutural constriction or other external mark of segmentation. 
R. dentaliniformis, nov.—A small, delicate variety of R. 
scorpiurus, but more slender and regular in contour; 
segments five or six in number, elongate, and but 
slightly ventricose. Length, +, inch (1'85 mm.). 
f. guttifera, nov., has pyriform segments, broadest near 
the base, and tapering to a narrow stoloniferous tube 
- at the point of union with the succeeding chamber. In 
small specimens the base of the segments is often 
truncate or even somewhat concave. Number of seg- 
ments very variable. Length, seldom exceeding ~; inch 
(1'5 mm.). 
VOL, XXI,-——-NEW SER. D 
