REPORT ON THE ANNELIDA. 
183 
bro’5VTi gland still lies behind the peduncle of the foot. At the tenth foot both dorsal 
and ventral glands are much enlarged, the former soon becoming as elevated as the 
lamella. It continues prominent all along the dorsum, forming posteriorly a thick 
lamelliform mass, projecting upward and forward at the inner edge of the superior 
lamella, and rendered very conspicuous by its brownish-olive pigment. The superior 
lamella (PL XXXII. fig. 11) becomes somewhat crescentic in outline, and its surface is 
variously frilled in the preparation. It appears larger than it really is on the body of the 
Annelid, since its peduncle is both broad and prominent. The setigerous region of the 
foot forms a short cone, which does not project so far outward as the margins of the 
lamellae, and its spine is also less prominent than in Alciopa. On each side of the latter 
(above and below) is a short cirrus. The inferior lamella also forms in its fully developed 
condition an irregularly crescentic plate, variously frilled. It is somewhat less than the 
dorsal. At its inferior and inner margin is a prominent lobate appendage attached to the 
base of the foot in front of the dark brown “ segmental” gland. 
The bristles (PI. XVa. fig. 4) project from the foot in the shape of a broad fan, and 
are straight and extremely translucent. They taper to slender tips, which have a 
terminal process attached to one side, a small portion of the tip of the shaft being visible 
beyond the point of junction. 
In transverse section the circular muscular layer is feebly developed outside the 
ventral longitudinal muscles, indeed, only a few fibres cross the outer region of the nerve- 
area. The latter lies in the superior augle of the decussating oblique muscles, which 
spread out beneath it. The cords are comparatively large and rounded. The hypodermic 
glandular tissue attains great development in the lateral appendages of the body. The 
wall of the alimentary canal is also furnished with a thick glandular lining. Male 
reproductive elements are present in the specimen. 
The tentacle and antennae of Greeffs Nauphanta celox differ from the foregoing, but 
otherwise there is a close resemblance. 
A similar form, in a softened condition, exists in the British Museum, from the South 
Pacific, collected in the tow-net by Commander Knocker, E.N. (68, 6, 29, 6). It is in the 
same bottle with Alciopa [Halodora) reynaudii, And. and Ed. 
Family Hesionid^. 
The number (five) representing the Hesionidae is comparatively small, though only 
one less than Semper s Philippine forms, and it is to be remembered that the group is 
more generally abundant in shallow than in deep water. The occurrence of a new 
genus, Dalhousia, from the deep water off the Canaries, somewhat allied to Claparede s 
genus Tyrrhena from the Bay of Naples, and of the intermediate type Salvatoria from 
Kerguelen, is especially noteworthy. Grube gives three in his Annulata (Erstediana, 
