234 



Annelida Ghcetopoda 



115 males ; they were simply dipped up with a scoop-net, 

 indiscriminately, no attempt being made to collect one 

 form rather than the other. 



Immature Female. Some specimens dug at low water, 

 July 21, had their bodies well filled with eggs, but were 

 otherwise unchanged, save that the bases of the feet were 

 swollen and elongated. 



Color : above pearl-gray, beneath, darker, in some cases 

 light purple. Feet white. 



Adult Male. Taken with female. Specimens very 

 numerous, as noted above. The 5th, 6th and 7th dorsal 

 cirri are longer and larger than the others. This is par- 

 ticularly the case with the 7th (f 68). The 8th cirrus is 

 normal (f. 69). 



Change in structure of feet begins on the 34th segment. 

 The development of the membranous plates is better 

 marked in the male than in the female. Those at the 

 bases of the cirri are much larger, and the circular plate 

 on the lower ramus is very large (f 67). 



Color : anterior segments pearl-gray. After the 33d 

 segment, body and base of feet above and below, red ; tips 

 of feet white. On each side of the body, both above and 

 below, a narrow white line. Extreme posterior segments 

 sometimes green, sometimes brassy, gleaming; anal seg- 

 ment with a crown of close set papillae. 



Nereis Dumerillii Aud. and M. Ed. 



AUD. and M. Ed. Ann. des Sci. Nat., vol. xxix, 1833, p. 218, pi. xiii, figs. 

 9-12. 



(For full description, synonomy, and figures see Ehlers, Borstenwiirmer, 

 p. 535 ; also Claparede, Appendix Ann. Cbet. du G. de N., p. 44.) 



Three specimens were found, all more or less injured, 

 but certainly belonging to this species. Dredged. 



