| OCR Text |
Show 1869.] DR. W. BAIRD ON NEV*? ANNELIDES. 311 striated round the external margin, and studded with granules internally, at the bottom of the cup. Both suckers are plaited on the margins. Each segment from the commencement of the body to within four of the posterior sucker is furnished on each side with a large foliaceous appendage, which is sessile, simple on the margin, but puckered and sinuated like the leaf of the endive. The only specimen the British Museum possesses is of a uniform very dark colour, the edges of the posterior sucker excepted, which are much lighter. Length about 1| inch, breadth (of body) 4 or 5 lines*. The habitat is unknown. The specimen was added to the Museum collection by the late Mr. H. Cuming. 2. BRANCHELLION LINEARE, Baird. Body linear-elongate, flattened, distinctly annulated. Segments of body about 32, those of neck not so distinct as those on the body, and about 10 or 12 in number. The neck is separated from the body by a well-marked constriction, but is nearly equal in diameter to the body. The oral disk is circular and smooth, or only finely striated interiorly. The ventral is considerably larger, circular, and densely granulated within the cup. The disks are slightly excentral. Branchiform lateral appendages simple, not puckered on the margin. Length about 6 lines, breadth about 1 line. This species was taken from a species of Mustelus in King George's Sound, N. Australia, by Mr. Rayner, Surgeon to H.M.S. 'Herald.' 3. BRANCHELLION PUNCTATUM, Baird. Body narrow, elongate, nearly flat on both ventral and dorsal surfaces, distinctly annulated. Segments somewhat striated on their backs, those of the body about 32 in number. Neck indistinctly annulated. Ventral surface light-coloured; dorsal dark, with numerous small, round, yellow spots scattered over the surface. The oral sucker is much smaller than the ventral, the margin thickened, and the cup is minutely granulated interiorly. Ventral sucker large, quite terminal, shallow, and with larger granulations on its interior surface. Branchiform appendages larger on the posterior portion of the body, simple, not puckered on the margin. Length of largest specimen nearly 1§ inch, breadth about 2 lines. The only specimen we possess in the British Museum collection was taken from a species of Myliobates caught in King George's Sound, N. Australia, by Mr. Rayner, Surgeon of H.M.S. 'Herald.' Genus EUBRANCHELLA, Baird. Margins of body furnished with linear, pinnated, instead of broad, foliaceous, appendages, much more resembling true branchiae than those in Branchellion. Neck separated from the body. Head small, leech-like. * The species described in this paper are all preserved in spirits; and being more or less corrugated by the spirit, the dimensions are only approximative. |
