1869. } DR. W. BAIRD ON NEW ANNELIDES. 313 
with rather narrow circular bands of dark brown on a yellowish 
ground. 
We possess only one specimen of this species. It was collected in 
Possession Bay, Patagonia, by Dr. Cunningham, naturalist to the late 
Surveying Expedition to the Straits of Magellan. 
Length of body about 2 inches, breadth (at broadest part) about 
4 lines. 
3. PoNTOBDELLA VARIEGATA, Baird. 
Body cylindrical, somewhat fusiform, much attenuated at the an- 
terior extremity. Posterior extremity the larger in cireumferenée, 
gradually tapering towards the head. Segments covered with smooth, 
conical, rounded warts, of nearly uniform size. The neck is com- 
posed of 10 or 11 segments, and is separated from the body by five 
narrower ones, all the segments being slightly warty. The aceta- 
bulum is considerably larger than the head, which is smooth on its 
margin, having no nodules round the rim. The body is marked 
with spots of a deeper brown colour on a yellowish ground, and the 
acetabulum is rayed with the same hue. 
We possess two specimens,—one in very good preservation from 
the Straits of Magellan, presented by the Lords of the Admiralty ; 
the other from Possession Bay, Patagonia, collected by Dr. Cun- 
ningham along with the preceding species. 
One specimen (somewhat contracted) measures about 2} inches 
in length, the other (more relaxed) is nearly 3 inches long; circum- 
ference (at the broadest part) 14 inch. 
4. PoNTOBDELLA RAYNER], Baird. 
Body cylindrical, much attenuated at the anterior extremity. 
Segments surrounded with raised conical warts, each wart having 
several small warts on itssummit. The neck is elongated, and sur- 
rounded, as is the body, with warts. It consists of 12 segments, 
and is almost continuous with the body, being slightly separated 
from it by five warty rings. The acetabulum is larger than the head, 
faintly rayed with brown, and somewhat puckered round the margin. 
The head is small, circular, and the margin has six small conical 
papillae. On the side of the head are two well-marked brown spots, 
somewhat triangular in shape. The warts on the body are so ar- 
ranged as to present one row of large ones, and two rows of smaller 
ones succeeding it; that is to say, every third row of warts is the 
largest. 
_ When relaxed, the length is about 1 inch ; when corrugated by the 
spirit it diminishes one-fourth. 
Hab. Found on a species of Rhinobatis in Sharks’ Bay, Australia. 
Collected by Mr. Rayner, Surgeon H.M.S. < Herald.’ 
Genus AuLasroma, Moquin-Tandon. 
1. AULASTOMA PLANUM, Baird. 
Body flattened, slightly convex dorsally, very flat ventrally, at- 
