W.C M‘INTOSH ON BRITISH ANNELIDA. 375 
with long pointed spines, a few having a bifurcation at the tip, or a series of blunt 
points. No cilia are present. The difference between this scale and that of Polynoé 
areolata, Grube, is marked ; for the arrangement on the surface of the scale is not only 
more regular in the latter, but the spines are much larger, less acute, few in number, 
and surrounded by a series of exquisite reticulations, while the margin is densely 
ciliated, especially at the outer and inner borders. ‘The dorsal bristles are long (only 
a little shorter than the ventral), and much tapered at the tip (Pl. LXVII. fig. 9). The 
tips of the ventral bristles are also elongated, and show a distinct process below the 
curve (figs. 10, 11). 
Lagisca proprnqua, Mgrn. A specimen of this species occurs in the British Museum, 
from Shetland. It is possible that the Lepidonotus semisculptus of Dr. Johnston, from 
the south coast of Devon, may be this form; but the original example has not been 
seen. A young specimen was found in the débris of the boats from deep-sea fishing 
off St. Andrews Bay. In this condition it is distinguished by the scabrous greyish 
scales mottled with black, the dark spots at the bases of the feet, and the coloration of 
the dorsum beneath the scales, by the form and position of the eyes, and the structure 
of the bristles. 
The head is curiously mottled. A pale band of considerable breadth occurs poste- 
riorly, boldly defined by the blackish collar of the first body-segment. A pale band 
runs from this forward in the central line to the base of the tentacle, which is blackish ; 
and the anterior angles of the head thus mapped off are brownish red, with dark grains 
along the edges. The posterior pair of eyes are large and widely separated, and 
situated on the pale band of the region. The anterior pair are not observed from the 
dorsum, being placed laterally exactly at the junction of the pale posterior and the 
coloured anterior regions. The tentacle is absent. The antenne are short, brownish 
at the base, furnished with long and clavate cilia, and a filiform tip. The palpi have a 
dense series of minute papille with enlarged tips. The tentacular cirri have a blackish 
patch at the base, a light brownish one on the slightly dilated portion near the tip, then 
a whitish patch, and, lastly, a dark brown one at the base of the filiform termination ; 
they possess long cilia with globular heads. The dorsal cirri have a similar colour to 
the latter. Besides the long cilia with the globular heads on the column of the organ, 
some shorter cilia proceed upward rather beyond the lower third of the extremity. The 
ventral cirrus is subulate, with sparsely distributed and short papille. 
‘The scales are dull greyish, with a dark patch in the centre. On the dorsal surtace the 
blackish pigment is broken into fragmentary portions. On the under surface, again, 
itis more uniform. ‘he outer and posterior edge of the scale is ciliated; as indeed is 
the greater part of the circumference. The cilia commence as short, almost baccate 
processes, and toward the outer edge assume the form of long organs with nearly 
globular extremities, the series again diminishing to terminate in short papillae. ‘The 
