OF PLYMOUTH AND THE ENGLISH CHANNEL. 251 



are an irregular circle. Surface and margin quite smooth. Translucent, 

 with faint granular pigment. Immediately behind the point of 

 attachment is a brown-coloured patch with a sharp anterior border, 

 fading gradually inwards and backwards. In the posterior elytra this 

 pigmented area occupies most of the hinder portion of the elytron, and 

 is fan-shaped. Xear the posterior margin is a more or less conspicuous 

 crescentic band of opaque white. 



Parapodia. Notopodium reduced to a mere stump with a very few 

 slender cha3tje or none. Dorsal cirrus resembling tentacular cirri, and 

 extending nearly to the extremity of the chpetse, except in a few 

 of the anterior segments where it projects far beyond. Neuropodium 

 well developed with numerous ch?et£e of a tolerably uniform character ; 

 the upper ones are longer and more slender. The spinulose rows are 

 well developed ; there are about forty of these on the more slender 

 chaitse, and they become reduced to about twelve on the ventral side, 

 the chfette becoming shorter and stouter and finally more curved. The 

 chffitffi are bifid. 



This remarkably fine species has recently been discovered at Salcombe 

 by Mr. Todd, existing as a commensal in the tubes of Amphitrite 

 JEdwardsi. 



It is one of the most brilliantly coloured of the Polynoids, and I am 

 indebted to Mr. W. Garstang for the following description of the 

 colour when alive : — 



" General colour a warm buff, occasionally inclining to pink in some 

 specimens. The intervals between the segments are marked by a 

 conspicuous transverse bar of dark brown. In the anterior half of the 

 body the bases of the cirrus-bearing parapodia are also coloured dorsally 

 with a diffuse patch of the same pigment, which is scarcely perceptible 

 on the elytron-bearing segments. 



" In the posterior half of the body the pigment on the bases of the 

 cirriferous parapodia fades completely away. 



" Each elytron bears a dark brown patch immediately behind its point 

 of attachment and spreading inwards towards the posterior border. 

 The anterior margin of this pigmented area is sharp and well defined, 

 but fades away distally. These pigmented areas lie on the lower 

 surface of the elytra, but are clearly visible through their translucent 

 integuments. In the anterior segments the spots are smaller and more 

 strongly pronounced than in the posterior segments, where they 

 gradually assume a broader and more fan-shaped outline. A more or 

 less crescentic streak of opaque white near the posterior border of the 

 elytra adds to the conspicuous character of these markings." 



While this description was being prepared I was enabled to visit 

 Salcombe during the spring tides of October, when I secured a dozen 



