SYLLIDAE 



93 



Description. A considerable number of small fragments which probably constituted 

 three individuals. The largest fragment measures 21 mm. by 2 mm. without the feet 

 and is composed of 59 chaetigers. The body is massive and arched dorsally. The colour 

 in spirit is pale yellow with vivid red-brown transverse bands across the back : this band- 

 ing is more intense in the forepart of the body than behind. 



T 2 mm 



^O 



a 



Irnm-r 



O-L 



I mm 



Fig. 29. Pionosyllis maxima, 

 a. Head. b. Foot. c. Bristle. 



The palps are fused at their base and the prostomium (Fig. 29, a) is broader than 

 long and rectangular. There are two pairs of almost contiguous eyes, one directly 

 behind the other. The three tentacles are slightly longer than the prostomium: the 

 median is inserted in the middle of the prostomium and the laterals further forward 

 in front of the eyes. The prostomium is deeply notched behind and the notch is hidden 

 by a flap-like prolongation of the buccal segment. 



There are two pairs of tentacular cirri, the dorsal almost twice the length of the 

 ventral: the dorsal cirrus of the ist chaetiger is the longest appendage of the body. 



