70 W. CO. MCINTOSH. 
formerly mentioned still exist on the terminal region, as, 
indeed, was observed in some examples in May. The eyes 
corresponded with those already figured in the Spio-like 
larvee (figs. 1 and 2), and are still much less than in Claparéde’s 
representations. The snout now forms a flattened spathulate 
process of considerable dimensions, though it is less in propor- 
tion than in the adult.! Moreover, no blood yet enters this 
region (snout), though the circulation in the tentacles is com- 
plete. The latter organs can be fixed to the glass vessel by the 
papille, which thus have adhesive properties. Each of the 
nine anterior segments is furnished with slightly clavate feet 
and bristles of considerable length. Then follow the constric- 
tion of the alimentary canal (which Claparéde does not indicate) 
and twenty segments, the first eight or nine of the series having 
still longer bristles than the foregoing division. The dorsal 
vessel (or vessels) sends powerful currents forward by regular 
contractions, which form a fold of the trunk opposite the fifth 
bristle-bundles.”, The opaque white glands of the posterior 
part of the proboscis were distinct on capture, but they became 
less visible after confinement in the laboratory. 
The Spio-like forms figured in Pl. 8, figs. 1 and 2, thus 
diverge from the unmistakable larve of Magelona figured 
by Claparéde and in fig. 3 of the plate just mentioned in the 
present paper. They show no transverse striz at the base of 
the tentacles, and the proboscidian region of the gullet is much 
shorter. Opaque white glands, however, occur at the sides of 
the latter posteriorly, and the arrangement of the eyes, the 
general contour and the number of segments in the anterior 
region of the body, are similar. Again, some examples agree 
with the two figured (Pl. 8, figs. 1 and 2), but have at the 
base of the tentacles indications of the ruge which fore- 
shadow the papille characteristic of the species in its adult 
1 Claparéde (op. cit., fig. 10) figures the younger stage with a considerably 
larger snout than the later stage, a feature perhaps due to individual variation. 
In a dying specimen, somewhat smaller than the present form, a large 
pinkish oil-globule occurred in the anterior region—the product of de- 
composition of the blood or other fluid. 
