746 OBSERVATIONS ON SOME AUSTRALIAN POLYCII.ETA, 



male specimen, having in all 125 segments, there is a sudden slight 

 increase of the breadth, and the first of the broader segments 

 bears two pairs of prominent brown eyes ; just behind the eyes, 

 on the same segment, is a parapodium similar to those of the 

 other segments. 



In the hypoderm a peculiarity of this species is the arrangement 

 of the glands. Instead of, as in S. Kmbergiana and S. corruscans, 

 being simple, rather large, rounded or flask-shaped cells, they are 

 very small and of irregular vermiculate shape, each opening by a 

 minute tube piercing the cuticle. 



Gnathosyllis zonata, JST. sp. 



(Plate LI1„ figs. 4-G.) 



The single specimen which I have seen contains fifty segments, 

 but is incomplete — a considerable part, apparently, of the 

 posterior portion of the body having been lost. The colour is 

 light orange, with numerous narrow transverse pnrple bands, two 

 on the dorsal surface of each segment, and very narrow purple 

 rings on the cirri ; the head and palpi are bright orange. 



The head is short and broad, the breadth about twice the 

 length. The eyes in the specimen had their pigment arranged in 

 a scattered, reticulate form, but I am not certain that this may not 

 have been the result of j^ost mortem change, as the specimen was 

 dead when examined. The palpi are rather short, scarcely longer 

 than the head. The median tentacle is about four times the length 

 of the head, with well-marked joints ; the lateral tentacles are very 

 little shorter than the mesial. There are two peristomial tentacles, 

 the one about the length of the praestomial tentacles, the other 

 longer. The segments are very short, very many times broader 

 than long. There are aboiit ten compound setse in each 

 parapodium on the ventral aspect, and on the dorsal four yellow 

 acicula with very slightly curved apices. The dorsal cirri are 

 mostly as long as the breadth of the body. 



The (esophagus is lined with about twelve papillce and a i)air of 

 simple jaws. When exserted this portion of the alimentary canal 



