172 Prof. M‘Intosh’s Notes from the 
beneath and so closely applied as to appear to be oblique 
rays supporting it. 
The first bristle-tuft is directed outward and forward, 
and the bristles have translucent straight shafts and a 
knife-shaped tapered tip. Two or three, again, have broader 
curved tips with a differentiation or “ bite” at the basal 
edge of the blade, but the serrations on this were not 
visible under the power used. 
The six pairs of bristles which follow slope upward and 
backward, have similar translucent straight shafts, but the 
tapered tips are more slender, and about two in each tuft 
have the curved tips with the differentiation of the base seen 
in the first bristle-tuft. The indistinctness of the serrations 
is in bold contrast with the condition of such species as 
Salmacina edificatrix, of Naples, yet the difference is only 
one of degree. 
The second region of the body seems to be devoid of 
bristles for a short distance, whilst the posterior part has 
them in pairs, the tips being long and finely tapered, with 
distinct wings at the base. De St. Joseph mentions one or 
two geniculate bristles in the ventral division. 
The minute, translucent, anterior hooks have a nearly 
straight anterior edge, serrated throughout and ending 
below in a main fang, ‘the outline being continued with a 
curve below the hook and ending at the basal edge. The 
crown is minute, and the posterior outline slopes to the base, 
which appears to have a straight edge. The rounded pro- 
jection below the main fang, shown by De St. Joseph in 
Filograna implexa, differs from that of the present examples. 
These hooks are situated slightly behind and to the ventral 
side of the bristles, and form considerable rows. The 
posterior hooks are smaller, but agree in structure with 
the anterior. They are placed on the dorsal side of the 
bristle-tufts, and are few in number in each row. 
The eggs are red and the embryos resemble those of 
Salmacina dystert. 
Early trochophores of a deep red colour occurred in the 
vessels on the 9th June, the prototroch being visible on 
each side. They simply rotate or swim in small circles, 
but the larve with commencing segmentation of the body 
dart through the water with great vigour, and often in a 
straight line; whilst others made larger circles near the 
bottom. One of the latter showed three segments behind 
the head, and in all the two eyes were distinct. 
The sperms seem to develop a little later than the ova, 
none, indeed, appearing in the bud, but by-and-by they fill 
