330 Dr. Johnston's Contributions to the British Fauna, 



spots are ocellated. Abdomen of a uniform straw-yellow, with a 

 visceral stain in the naiddle. Segments numerous, each with a 

 papillary foot armed with a fascicle of unequal bristles. Anal 

 segment terminated by two short conical filaments of similar struc- 

 ture to the antennas. 



Hab, Amongst fuci, rare, 



Obs, The motion of this animal is very slow. It is readily 

 distinguished by its light-coloured back, and regularly spotted 

 sides. It has the habit of the Polijnoe^ under which genus I had 

 placed it in my note book, but in its characters it corresponds 

 better with the Palmyra; though having seen no other species, I 

 cannot say with what propriety it is described as such. I have 

 carefully compared it with the descriptions of Jphroditce of 

 British authours, from all which it is quite distinct. May it not 

 be the Nereis maculosa of Montagu ? 



Gen. PoLYNOE. Savigny. 



Of the AphroditcB five species are enumerated in the Com- 

 pendium of Dr. Turton. Three other species have been since 

 added, — the A. imbricata by Professor Jamieson, and the A. clava 

 and viridis by Mr. Montagu. Of these, one enumerated by Dr. 

 Turton, (yi. acukata^) belongs to the modern genus Halithea. 

 It is uncertain to what genus another, (the A. annulata,) ought to 

 be referred. The species which remain are referable to the genus 

 Polvnoe, Sav., but their descriptions, with the exception of those 

 of the A. clava and viridis of Montagu, are so imperfect, that it has 

 become impossible to identify them with any certainty. Under 

 these circumstances, I have thought an accurate account of three 

 species which are common in this neighbourhood, and which are all 

 perhaps already known, ought not to be considered out of place 

 in these contributions, which have for their object as much the 

 amendment of what is known, as the addition of what is new. 

 I have to regret however that, in my attempt to elucidate these 

 species, I have not been able to avail myself of the works either 

 of Pallas or of Bosc, 



