368 A. E Verrill— Marine Fauna off New England Coast. 



by us in 1881, was not uncommon, but only the females were 

 taken at the surface. The stem-form occurred among hydro-ids 

 and ascidians at moderate depths. This species is remarkable 

 for the large number of sexual individuals that may be devel- 

 oping, simultaneously, from the stem-form. It is not uncom- 

 mon to find it carrying five or six sexual individuals, in 

 various stages, one behind another. 



A very singular Syllidian,* of which only the sexual forms 

 are known, was taken several times at tlio surface, in the even- 

 ing. We also took these in 1880 and 1881. They have proba- 

 bly been detached from a very different stem-form. The genus 

 is allied to Chcetosyllis Mgn., but the head is entirely destitute of 

 antenna?. It has four large eyes and swims very actively. 



Odontosyllis lucifera Y., of both sexes, was very common in 

 the surface nets all through August and to Sept, loth, but 

 mainly in the evening. With the latter a smaller and more 

 delicate species usually occurred, but in less abundance. This 

 belongs to the genus Eusyllts\ and has been known to me for 





