NEREIS CITLTRIFERA. 



287 



Reproduction. — An almost ripe male was observed on July 1st, and as no alteration 

 of the feet was visible the epitokons condition wonld appear to be suddenly developed. 



In a male towards the end of November the reproductive elements form large 

 compound cells with many nuclei, and they vary much in size. Most are more or less 



Fig. 66. 



Fig. 67. 



Fig. 68. 



Fig. 69. 



/ 



Fig. 66. — Nereicola ovata, male, as a transparent object. Fig. 67. — Female from the dorsum. Fig. 68. — Young 

 female from the dorsum. Fig. 69. — The adult female in lateral view. All masfnified. 



rounded. Besides these are translucent spheres and groups of smaller cells with nuclei — 

 apparently having escaped by rupture from the larger corpuscles. They measure about 

 •00021 in., the smallest being one sixth of that size. There are also elongated transparent 

 bodies. When breaking up, the smaller corpuscles show coarse granules, and probably 

 these pertain to the wall of the alimentary canal. 



