154 _ Prof. M‘Intosh’s Notes from the 
The second tuft has bristles with simple wings. The rest 
of the tufts in the anterior region have, in addition to the 
simple winged bristles, two or more with sickle-shaped 
or falciform tips, and in the ordinary preparations (micro- 
scopic) these are posterior. These tips are translucent and 
flattened, widened at the end of the shaft, characteristically 
curved and tapered to a fine point. 
The bristles of the posterior region are few in number 
in the groups, and follow a blank space behind the anterior 
region. Though smaller, the structure is the same as the 
simple winged forms. The wings on the slender bristles of 
the last three or four segments are very narrow—just 
visible in living examples. 
So far as can be ascertained, the hooks in the various 
forms correspond in intimate structure, 
Though the Polycheta as a rule are unisexual, various 
hermaphrodite annelids are known; thus H. Parlin Johnson 
gives a list of sixteen or seventeen species possessing this 
character. No form, however, is more interesting than 
Filograna (Salmacine) which not only is hermaphrodite, but 
reproduces also by budding, as first pointed out by Huxley. 
In the hermaphrodite anunelids, as Malaquin clearly observes, 
the male and female gonads may be quite distinct, as in the 
Nereid Lycastis quadraticeps, Gay, or they may be mixed, 
as in Ophryotrocha puerilis. Inthe Salmacine and Spiror- 
bids, on the other hand, the male and female gonads are in 
different segments. 
The budding in Filegrana, as Sars noticed, takes place in 
the posterior region of the adult, viz., where the long paired 
bristles eecur—six or seven of these being in front of the bud, 
which is formed of the caudal region of the nurse-stock with 
the vent and its two papilla. | 
The early buds are ovoid and granular, wider than the 
ordinary caudal region, with nine or ten pairs of bristle-tufts 
characteristic of the posterior region, the anterior division 
being devoid of them, but having simple smooth filaments 
representing the branchie. No special differentiation of the 
granular interior of the bud can be made out, further than a 
more opaque granular wedge in front of the anal papilla, 
and which probably represents the adult rectum. No trace 
of the collar is at first visible, then a fold, probably the 
ventral, occurs at the base of the short filaments. 
In the next stage the body of the bud is more elongated, 
the bristled segments are more numerous, and a streak along 
the middle line leads to the vent, and is in contact anteriorly 
with the alimentary canal of the adult, which in one con- 
tained a large foreign mass about its middle. ‘The branchiz 
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