10,21.] 



Fauna of the Chilka Lake ; Polychaeta. 



591 



with long finely serrate tips. They are guarded behind by a fillet which is attached to 

 the dorsal and median ligules. 



The tip of the spine, which is curved and enclosed in a sheath of gland cells, 

 lies between the median ligule and the dorsal setigerous lobe. The ventral division 

 resembles that of the ist foot, except that the setae are much more numerous, form- 

 ing a continuous row. At the 18th foot a number of falcate hemigomphs appear in the 



O 



Text -fig. 5. — Parapodial diagrams of Nereis glandicincta, sp. nov. 

 a. ist foot. b. 10th foot. c. 30th foot. d. 50th foot. e. 100th foot. 

 • = Homogomph setae with long finely serrated tips ; — = Hemigomph setae with short coarsely serrated tips : 

 x = Hemigomph setae with long slender finely serrated tips ; o= Hemigomph setae with falcate tips. 



ventral division. The 20th foot is very like the 10th in shape. The median ligule is 

 relatively larger. 



In the 30th foot (text-fig. 5c) the dorsal and ventral cirri, and the dorsal and 

 ventral setigerous lobes have decreased relatively in size, whilst the dorsal, median and 

 ventral ligules have increased. In the ventral setigerous lobe, as compared with the 

 10th foot, the setae are fewer and some of the hemigomphs with short coarsely serrate 



