CIRRATULIDAE i6i 



Family CIRRATULIDAE 



Genus Cirratulus, Lamarck 

 Body long and cylindrical. Head conical. First three segments achaetous. Gills 

 beginning on the first few chaetigers and continued over most of the body. Slender 

 tentacular filaments appearing on the same segment as the first pair of gills. Pedal lobes 

 very little developed. Either capillary bristles only in both rami or both capillary 

 bristles and hooks in a certain number of feet. 



1. Both capillary chaetae and hooks present C. cirratus 



With capillary bristles only ^ 



2. Tentacular filaments on first chaetiger C. filiformts 



Tentacular filaments on 3rd-5th chaetigers C. antarcttcus 



Cirratulus cirratus (O. F. Miiller). 

 Fauvel, 1927, p. 94, fig. 33 a-g. 



Occurrence. St. WS 25 (2); WS 33 (2); WS 772 (2). 



Specific characters. Head bluntly conical. A row of four to eight eyes on each side. 

 Gills from the ist chaetiger almost to the end of the body. Two groups of slender 

 tentacular cirri, one on each side of the dorsal surface of the ist chaetiger. Capillary 

 bristles in both rami of the feet, and in addition hooks in the notopodia from about the 

 20th chaetiger and in the neuropodia from about the loth. 



Cirratulus antarcticus, Monro. 

 Monro, 1930, p. 155, fig. 59. 



Occurrence. St. 144 (4); WS 766 (i). 



Specific characters. Head bluntly conical. No eyes. The two postbuccal achaetous 

 segments not clearly distinguished. Gills begin on 3rd chaetiger. About eight pairs of 

 tentacular filaments on the 3rd-5th chaetigers. Capillary bristles only. Hooks absent. 



Cirratulus filiformis, Keferstein. 

 Fauvel, 1927, p. 94, fig. 33 h. 



Occurrence. St. 28 (numerous). 



Specific characters. A large number of small thread-like, broken cirratulids, which 

 appear to belong to this species. Branchiae are present from the ist chaetiger through- 

 out most of the body. There is a single pair of relatively stout tentacular filaments on 

 the ist chaetiger. There are capillary bristles only and no hooks. 



Remarks. I believe this to be the first record of this species from Antarctic waters. 



Family SPIONIDAE 



Genus Polydora, Bosc 

 Prostomium notched or rounded in front, prolonged behind into a blunt crest. Two 

 long ciliated palps. Branchiae begin on the 6th-9th chaetiger, rarely on the 2nd. Fifth 

 chaetiger much modified with special, giant, dorsal bristles. Dorsal and ventral bristles 

 capillary. Hooded bidentate crochets from the yth-Sth foot. An anal sucker. 



