W. C M'mTOSH 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 Polyno'e 

 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 (PI. LXVII. fig. 9). The 

 tips of the ventral bristles are also elongated, and show a distinct process below the 

 curve (figs. 10, 11). 



Lagisca propinqua, Mgrn. A specimen of this species occurs in the British Museum, 

 from Shetland. It is possible that the Lepidonotus semisculjitus 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 debris of the boats from deep-sea fishing 

 off St. Andrews Bay. In this condition it is distinguished by the scabrous gi-eyish 

 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 brovraish 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 antennae are short, brownish 

 at the base, furnished with long and clavate cilia, and a filiform tip. The palpi have a 

 dense series of minute papillae 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 papillae. 



The scales are dull greyish, with a dark patch in the centre. On the dorsal surface the 

 blackish pigment is broken into fragmentary portions. On the under surface, again, 

 it is more uniform. The 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 papilla;. The 



