Annelida of the Bermudas. 635 



more distinctly articulated ; its setoe are partly compound with 

 bidentate tips, as in Syllis, and partly simple, with bidentate or 

 forked ends. 



Sjmsyllis, subgen. nov. Type S. viridula V. 



E. mridxda Ver., described above, p. 622, and E. longigularis (p. 

 624), differ from the type chiefly in having posteriorly mostly simple 

 forked setse or crotchets, like the stem of a compound seta having 

 a short blade consolidated with it ; and by having regularly beaded 

 cirri and large, entirely separate palpi, as in Syllis. 



Langerhans (1879, p. 550) united M JBlomstrandi and E. lamel- 

 ligera Mar. and Bobr., which differ so considerably that it seems 

 impossible they can be identical. St. Joseph, op. cit., p. 171, clearly 

 separated them, Malmgren's species is described and figured as 

 having entirely separate palpi, while E. lamelligera is represented 

 as having them united for nearly half their length; the latter also 

 has flat, large, differentiated ventral cirri on the first parapodia, and 

 a pair of large saccular gular glands. These characters would indi- 

 cate a generic difference. 



Desmosyllis, gen. nov. 



Type D. tenera Ver., Brief Cont., 53, p. 368, 1882, (as EusylKs). 

 Two species from our coast — D. tenera Ver. and D. fragiUs (Webs. 

 1879, as Syllis) agree in having the large palpi united for about 

 half their length, and in having long, regularly articulated antennas 

 and cirri. Most of the setae are compound with bidentate blades, as 

 in Syllis. In D. longisetosa, (see page 626) there is also a single, 

 long, needle-like seta in most of the fascicles. 



For this group, which I think ought to rank as a distinct genus, 

 I propose the name Desmosyllis. To it may belong D. lamelligera 

 (Mar. and Bobr.) referred to above, though in the latter the cirri are 

 less strongly articvilated. But the partial union of the palpi is a 

 character of much greater importance. 



Hemisyllis Ver. See p. 619, above. 



The Bermuda species, described above as Hemisyllis dispar^ also 

 has the palpi half-united, but it has only a few, simple, unequally 

 bidentate or birostrate setse, all alike, as in Haplosyllis. Like the 

 latter, it inhabits sponges. 



Trans. Conn. Acad., Vol. X. December, 1900. 



42 



