m 



clear vesicles, which in my specimen were present in an extreme 

 anterior position, and also laterally in the head and the two suc- 

 ceeding segments. 



Two very young worms bearing parapodia have been taken. 

 One specimen showed five segments behind that of the head, the 

 first (as in the adult) being without parapodia, as likewise was the 

 fifth, while segments, two to four, were provided with them. A 

 ]oair of lateral cirri and a single median one were present on the 

 fifth. In the second specimen, which had six segments behind 

 the head, segments two to four onh^ had parapodia, while the sixth 

 was provided with a pair of lateral cirri. Other young specimens 

 with six and more pairs of parapodia were not infrequent. 



Among the larvae it was interesting to find that females of 

 Dinophilus gyrociliatus were also swarming. 



