138 Prof. M‘Intosh’s Notes from the 
older examples without a bud the anterior region had seven 
pairs of bristles besides the collar pair, a considerable smooth 
region, and fifteen segments and the pygidium posteriorly. 
‘The branchiz were well developed, with sausage-shaped en- 
largements of the tips of the filaments, and the pinne were 
much longer than in the former. The apertures of some 
of the tubes show a slight expansion like the muzzles of 
old-fashioned shot-guns for sparrows, whilst others have 
cylindrical though rounded margins. In the first series 
of bristles, which in lateral view have the tip at an angle 
to the shaft, the basal part of the wing has numerous 
(fully a dozen) serrations sloping from the base to the 
distal end in lateral view, and then a hiatus, followed by 
a minutely serrated tapering blade. When viewed from 
behind, the shaft diminishes little to the end of the basal 
section of the wing, and the axis can be followed, as distinct 
from the wing, from the base to the tip, and then gradually 
tapers distally. Certain views point to the double nature 
of the basal expansion, serrations being seen on both sides. 
It may be that something similar exists in the distal wing. 
What have been mentioned elsewhere as simple bristles 
in this tuft are apparently only developing forms of the 
special type. 
Channel Islands (off Guernsey and between tide-marks, 
Herm). 
Most form fixed tubes on shells and stones—two opercula, 
as a rule, on each; these may be large and thin, or less 
expanded as circular dises. No enlargement of the tips of 
the other filaments. This form is common under stones (to 
which it is attached) between tide-marks in the Channel 
Islands. Ova occur in the posterior region of body. In the 
structure of the collar-bristles no distinction can be drawn 
between these and the Plymouth forms. The shaft, basal 
wings, and tip are the same. The hiatus and the mode of 
origin of the distal part of the wing agree, as also do its 
mipute serrations. 
St. Andrews. 
Branchie without an operculum in two bearing buds; 
tips of branchize cylindrical in some, in others slightly 
clavate (in the spirit-preparations). The condition of the 
branchiz depends on age; in young examples the filaments 
and pinne are short, but they vary, some of the same size 
of bedy having larger and better-developed branchie. The 
young have a short body. The collar-bristles show several 
with curved tapering tips, which do not have the gap 
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