364 PROCEEDINGS: BOSTON 
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Text -fig. 5. — Polycilnr kiU^enthali 
(Gottschaldt). Zooid. X 30. 
SOCIETY NATURAL HISTORY, 
atrial orifices are similar in appear- 
ance, each having six blunt lobes. 
The branchial orifice is but little 
produced in the contracted speci- 
mens, but the atrial orifice is at the 
end of a distinct, though short, an- 
teriorly directed tube. 
There is a circle of about a 
dozen slender tapering oral tenta- 
cles, longer and shorter ones alter- 
nating. In addition there are a 
number of verv much shorter tenta- 
cles inserted a little nearer the ori- 
fice. In the atrial siphon there are 
no tentacles. The dorsal languets 
are long and slender, resembling the 
tentacles. 
The violent contraction of the 
thoracic muscles renders the walls 
of the thorax so thick and opaque, 
and has so crushed and folded the 
branchial sac that its structure can 
be made out only with the greatest 
difficulty, and not without consid- 
erable possibility of error, but after 
examining a large number of zooids, 
the writer is very decidedly of the 
opinion that there are but four rows 
of stigmata, ^^■ith probably over 
twenty in a row on each side, and 
the branchial sac has accordingly 
been so represented in the figure 
(text-fig. 5). The transverse ves- 
sels are slightly muscular, and 
moreover bear a narrow inwardly 
projecting membrane. 
The esophagus and ascending 
jntrt of the intestine are very long, 
and the intestinal loop beyond the 
stomach is likewise of considerable 
lenoth. The stomach is large and 
