I 9 2I.] 



Fauna of the Chilka Lake : Polychaeta. 



631 



The ist foot (fig. i8j, and text-fig. ija) consists of three lobes, one in front of 

 the setae and two behind. The small spine, with bent tip, lies behind the front lobe. 

 The setae are all compound, and lie in two groups, 4 beneath the upper lobe, and 

 3-4 between the anterior and lower lobes. The 2nd foot is similar, and there is an 

 additional seta in each group. The 3rd foot has 9 dorsal and 4 ventral setae. In 

 the 6th foot the anterior lobe is much natter and wider, and a small lobe appears 

 behind it. The two posterior lobes have moved further apart, and now obviously 

 represent the dorsal and ventral cirri. 



At the 10th foot (fig. i8k, and text-fig. 17e) all the lobes are flatter. The dorsal 

 cirrus has taken up a more elevated position. It has a rounded ventral projection 

 near the base, and is also indented near the tip, the latter characteristic being very 







Text -fig. 17. — Parapodial diagrams of Glycinde oligodon, sp. nov. 



a. ist foot ; b. 10th foot ; c. 30th foot . 



•= simple dorsal setae ; x = compound ventral setae. 



constant in all the subsequent feet. Theanterior lobe is very much enlarged, flat and 

 tapering to a slender tip. There are 8 setae above and 7 below the spine. The 15th 

 foot is very similar, the dorsal spine and setae being still absent. In the 20th foot 

 the dorsal cirrus is still more obviously enlarged near the base, which projects out- 

 wards as two small papillae, between which terminate the dorsal spine and one or 

 two slender spines. 



At the 30th foot (fig. i8l, and text-fig. 17c) the dorsal division consists of the 

 short stout swollen base of the dorsal cirrus, the latter organ, with its indented tip, 

 being carried on the upper surface. Beneath the dorsal cirrus lies the dark reddish 

 brown spine, accompanied by two or three dark brown setae (fig. i8n), which do not 

 pierce the skin. In front of the spine is a small rounded papilla. The ventral divi- 



