REPORT ON THE ANNELIDA. 
421 
Sahellaria (Pallasia) giardi,^ n. sp. (PL XLVII. fig. 7; PI. XXVIa. figs. 13-15). 
Habitat. — Dredged at Station 163 b (off Port Jackson, Sydney), June 3, 1874; lat. 
33° 51' S., long. 151° 22' E. ; depth, 35 fathoms ; bottom temperature 63°‘0, surface 
temperature 69° ‘0 ; sea-bottom, hard ground. It was found during the examination of 
Aplirodita australis deeply imbedded amongst its bristles. 
The specimen is fragmentary, measuring about 7 mm. in length, and a little less than 
2 mm. in diameter at its widest part. 
It apparently belongs to the same type as Sahellaria (Pallasia) jolinstoni, and thus 
differs from Sahellaria (Pallasia) capensis. It has, however, features peculiarly its own. 
The crowm is furnished with a double row of very long brittle palese. The outer are 
thinner and more flattened than the inner. Each springs from a somewhat pointed base, 
gradually widens out into a broad, flat blade, finely striated longitudinally, and, again, 
slightly diminishes toward the tip, which is rapidly sloped to a point (PI. XXVIa. 
fig. 13) and marked by a few transverse lines. In certain lateral views a few notches 
or serrations occur below the tip. The outer palem are directed forward with the tips 
slightly bent outward. A faint curvature is evident between base and tip. 
The inner palese, again, are likewise directed forward, but have the tips inclined some- 
what inward. They are more robust organs (PI. XXVIa. fig. 14) than those of the 
exterior row, and have a fusiform shape, but less diminished interiorly than superiorly. 
They are hollow, the tapering portion toward the extremity being strengthened by 
thicker walls, and the whole inner region marked by fine longitudinal strim. Like the 
outer palese a slight curvature occurs between base and tip. 
Along the outer base of the external row of palese is on each side a series of about 
eleven papillfe, which increase in length dorsally. The last forms a somewhat con- 
spicuous cirrus over the dorsal hook. The latter is a pale amlDer-coloured organ 
imbedded in the tissues, the curved tip alone emerging from the surface. The hooks are 
thus less prominent than in the other species. The cephalic region is tinted of a pale 
brownish hue. Ventrally, the bran chise- arise by fewer stems than in the other species, 
about eight being conspicuous. 
The mouth has two similar palpi, with cirri in front, but in addition it possesses at 
the base of the latter an outer and an inner acutely lanceolate flattened cirrus. No 
bristles are visible under a lens at the side of the mouth. A little behind the two last- 
mentioned cirri are two others below the branchiae. It is probable that the two former 
are morphologically connected with the same row though they have moved forward. 
The thoracic or anterior region quite differs from that of the previous form in having 
four rows of great dorsal bristles. These have the usual oar-shape, and are generally 
’ Named after M. Alf. Oiard, author of various important papers on animals allied to the Annelida. 
