177 
j3. ochracea, uniform pale orange or stone colour. 
Polynoa cirrata, Johns. Very rare. 
P. asterince, sp. nov. Linear-oblong, scales twenty pairs 
or more, smooth, with a black entire border, seated on each 
third ring ; intermediate feet cirriferous, hearing at the base 
a ciliated crest. Upper antennae three, the central one 
longest.* 
Not uncommon, occupying the groove between the suckers, 
of Asterias aurantiaca. I was first led to suspect the presence 
of some foreign species, by observing a blue phosphorescent 
light, given off from defined points of the rays, when the star- 
fish was placed in fresh water. It seems a very sluggish 
worm, and how it contrives to escape the surrounding suckers, 
and whether it shares the food captured by the star-fish, are 
points yet to be determined. 
Body one to two inches long, by a line in breadth, 
posterior segments narrowed, ending in two filiform styles. 
Peach-blossom, or flesh coloured ; very fragile, so that it is 
almost impossible to obtain an entire specimen. Scales white, 
chartaceous, with a narrow black border ; first six pairs 
placed on alternate feet, the remainder on each third foot, 
not broader than the body, so that the feet are exposed, 
easily detached. In a line with the pedicels of the scales, on 
the intermediate rings, we find on each side a crest-shaped 
process, ending towards the mesian line in a short papilla. 
These are ciliated, as are the upper margins of the feet, so 
* In describing a species, I have thought it best to follow the nomencla- 
ture now in use, although I agree with Professor Huxley that a change is 
desirable. He proposes, after Milne Edwards, that the rings shall .be called 
somites , the head prestomium, central antenna prestomial tentacle , upper and 
lower lateral antennae superior and inferior prestomial cirri , foot tubercle 
parapodium, its upper and lower rami notopodium and neuropodium, &c. 
I think it right also to state, that as my acquaintance with Marine 
Zoology is very recent, and I have been unable to consult several foreign 
works on the subject, I introduce the following species with great diffidence. 
To the best of my belief they are new to the British fauna, nor have I been 
able to identify them with species described by Aud. and Edwards, Oersted, 
Qrube, Elder s, &c. 
