MONOOKAPH OF THE AMPHIIS'OMACEA. 235 



The body of this worm is rather narrow, of a depressed fusi- 

 form shape, about 2 inches long, and half an inch broad, in- 

 cluding the setae of feet. Segments of body from 32 to 35. 

 Eyes small, the anterior pair larger than the posterior. Ca- 

 runcle long, extending over a considerable number of segments, 

 rugose, the summit of the crest marked with a waved dark line. 

 Branchiae finely and delicately pinnatifid, the main branch of a 

 light colour, the branchlets very dark. Setae of feet yellow ; 

 those of the ventral feet forming a tuft considerably larger than 

 that of the dorsal, and in both formed like that of those of 

 Chloeia Jlava — those of the dorsal tuft having their apex for a 

 little way down on the inner side serrated with harpoon-shaped 

 teeth, while those of the ventral tuft are furcate near the apex 

 and simple. The back or dorsal surface of the body is wrinkled, 

 of a pale delicate flesh-colour, and is marked on the middle of 

 each segment, between the branchiae, with a distinct rather 

 broad line of a very dark colour — not square-shaped, as in C. 

 fiava, but extending in length to more than half the breadth of 

 the segment. The dorsal row of setiferous tubercles is also 

 marked with a dark line running partly across them just above 

 the tuft of setae. The ventral cirri are nearly white and finely 

 pointed ; the dorsal cirri are of a very dark colour, and are 

 longer and more slender than the ventral. The anal cirri are short 

 and cylindrical, and rather stout. 



Var. a. pallida. 



We are indebted to Mr. Jukes for a specimen of a worm 

 which I consider to be only a variety of Chloeia pulcJiella. It is 

 nearly colourless in all parts except the peculiar marks on the 

 dorsal surface of the segments. The setae of the feet are of a 

 lighter yellow colour, but their structure is the same as those of 

 pulchella. The worm is a little larger, and the coloui'less branchiae 

 are rather larger also than those of the type specimens. 



Hah. Eaine's Islet, North Australia, J. B. Jukes {Mus. Brit.). 



Uncertain Species. 



?Chloeia rupestris, Risso, Hist, nat, Eur. merid. iv. 425. 



This species evidently belongs to another family altogether. 

 Quatrefages says it most probably belongs to the genus Eunice. 

 M. -Edwards says he cannot refer it to any genus of the family 

 Amphinomidae, as Risso describes it as possessing jaivs, a cha- 

 racter which does not belong to any species of the family. 



