Vou, 2] Robertson.—Non-Incrusting Bryozoa. 
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26. Stirparia ciliata, sp. nov. 
Pl. XII, figs. 67, 68, 69; Pl. XIII, figs. 70, 71. 
Zoarium composed of numerous flabellate tufts borne on the 
summits of a number of erect, stiff, segmented branching stalks, 
the whole attaining the height of 25 or more mm. (fig. 67). 
The segments (fig. 68, seg.) of the stalk aborted zoccia, the lat- 
eral disk at the distal end of each representing the aborted aper- 
ture (ab. ap.). Stalks branching at irregular intervals, branches 
(br.) frequently arising from the aborted aperture. Segments 
of about equal length and formed by rather deep constrictions, 
there being no distinct joint or articulation, the segments of the 
stalk passing insensibly into the normal zocecia forming the tufts 
at the distal end of the stalk; the first zocecium of the branching 
tufts similar to the distal segment (dis. seg.) of the stalk, being 
often but little shorter, and but shghtly modified in other re- 
spects from the ordinary stalk segments. This first zocecium tubu- 
lar, elongated, possessing a circular aperture occupying about 
one-third the length of the zocecium, and surrounded by spines; 
from its anterior extremity two zocecia arise, and as growth 
proceeds the zowcia that subsequently appear in the branch ac- 
quire the typical form. Zowcia of the Bicellarian type, broadly 
ovate above, tubular below, the aperture looking upward, the 
tubular portion inclined inward (Pl. XIII, fig. 70). Aperture 
oceupying about half the front or less, margin thin, surrounded 
by six or seven spines (c. sp.) which tend to curve inward. Five 
or six spines on the outer edge, one on the inner just opposite 
the lowest outer spine; zocecium at bifurcation (b7. zoe.) usually 
lacking all spines except the two opposite lowest ones. Avicu- 
laria (av.) pedunculate, small, situated just below the aperture 
on the outer side, usually developed sparingly. Owcia (Pl. XIII, 
fig. 71, oe.) pedunculate, globose, developed on the side of the 
aperture just above the spine on the inner margin; found on 
every zocecium of some of the branches, especially of those at 
the tips. Rootlets springing from the lower segments of the 
stalk, proceeding downward close to the stalk, often enclosing it 
with a sheath, then becoming free at its base, spreading, often 
