Gatty Marine Laboratory, St. Andrews. 29 
to the truncated posterior end. The middle region consists 
of two long segments. The caudal part is crenated from 
the various rings, and the achzetous last segment is truncated 
distally with a small papilla—probably representing the 
anus. Glands are distributed extensively in the body-wall. 
The bristles have the shape of a pointed assegai or sharp 
spear, the cylindrical shaft being stout, and the tip a 
flattened translucent spear-point. 
The hooks are minute, apparently few in number, and have 
a rudimentary shaft, which enlarges into a bulbous shoulder, 
above which the neck is rather thick. The main fang is 
curved downward at considerably less than a right angle to 
the neck, and the crown of the hook is high, with five or six 
teeth. In general shape these hooks somewhat resemble 
those of Lumbriclymene minor, Arwidsson. No gular bristles 
are present. Mesnil thought the hook resembled an avicular 
Sabellarian bristle, and that it showed the evolution of 
a Maldanid toward that group. Such views, however, are 
conjectural. He found one example containing greyish ova. 
EXPLANATION OF THE PLATES. 
Puate I. 
Fig. 1. Serrated or spiked bristle of Hwmenia caulleryi, sp.n. xX 350. 
Fig. 2. Smooth dorsal bristle. x 350. 
Fig. 3. Branchie of one side. x 350. 
Tig. 4. Brada graviert, sp.n. Enlarged under a lens. 
Fig. 5. Dorsal tuft of bristles. x 350. 
Fig. 6. Great ventral bristles, the base being at the top of the Plate. 
x 360. 
Fig. 7. Anterior bristle of Fauveliopsis challengeria, sp.nu. X 3650. 
Fig. 8. Pear-shaped papilla of the foot. x 350. 
Fig. 9. Anterior bristles of greenish papillose Oligocheet, Hemitubifer 
benedent, Beddard, from St. Andrews. x 380. 
Fig. 10. Posterior hook. x 850. 
PuatE II. 
Fiy. 1. Fauveliopsis challengerie, sp. n., from the dorsum, Enlarged. 
Fig. 2. Ventral aspect of the same. Enlarged. 
Fig. 3, Lateral view, showing the lozenge-shaped areas between the 
bristle-tufts. Enlarged. 
Fig. 4. The anterior region more highly magnified. 
Fig. 5, Anterior bristles projecting from the foot. x 350. 
Fig. 6. Posterior tuft of bristles. x 350, 
Fig. 7. Tube of the foregoing. Twice natural size. 
tg. 8. End of tube, more highly magnitied. 
Fig. 9. Lateral view of the anterior segments of Ewmenia hystricis, 
sp. n. Enlarged under a lens. 
Fig. 10. Hook of Melinna buskit, sp.n. x 700 diam. 
Fig. 11. Outline of Phascolosoma lankestert. Magnified under a lens. 
“4g. 12. Posterior end of the latter with papillae. x 90. 
