Manchester Memoirs, Vol. xlv. (1901), No. 13. 5 



Number of V-shaped Teeth. 



The Parapodia are large, well-marked structures, 

 which, in the middle of the body, take up at least two- 

 thirds of the breadth of the animal. In the anterior 

 parapodia the notopodium is represented only by a 

 ■curved dorsal cirrus ; the neuropodium is here a well- 

 marked triramous structure with a lancet-shaped ventral 

 cirrus. About the 56th segment a small finger-shaped pro- 

 cess grows out below the dorsal cirrus ; on this segment the 

 process is devoid of bristles, but on the following segment 

 this portion of the notopodium bears a single capillary 

 bristle. The parapodia continue to grow larger towards 

 the middle of the body ; the notopodium becomes a well 

 marked structure ; the dorsal cirrus becoming smaller in 

 comparison with the increased size of the notopodium. 

 The capillary bristles of the notopodium are quite distinct 

 from the jointed bristles on the neuropodium, which also 

 increase in size in this part of the body. 



Posteriorly the parapodia diminish in size, and there 

 is a corresponding reduction in the number of bristles 

 borne by the notopodia and neuropodia respectively. 

 Throughout the whole length of the body the triramous 

 neuropodium is a larger and more important structure 

 than the notopodium. 



The most important feature of the parapodia is their 



