of the Vir(/t7iian Coast. 



217 



Fam. SYLLLD^. 

 SYLLIS {8av.) Efdert. 



Syllis gracilis Gnibe. 



Grube. Actinien, Ecliinodermen rmd Wunner, p. 77. 

 Clapabede. Glanures Zootomiques parmi les Annelides de Port- Vendres, 

 p. To, pi. V, f. 3. 



Claparede. Annel. Chetopodes da G. de N., p. 503, pi. xv, f. 3. 

 Marion et Bobretzky : in Ann. des Sciences Natnrelles, 6th series, vol. 

 xi, p. 23, pi. ii. f. 6. (1875.) 



The speciraeus from Virginia agree perfectly with the de- 

 scriptions given by Grube and Claparede. As remarked 

 by Marion and Bobretzk, the figures of the farcate setae 

 given by Clpd. are very inaccurate. Those of M. and B. 

 are very good, and removed the last doubt as to the 

 identity of the Virginian specimens vrith S. gracilis Gr. 

 They are, however, smaller than even those described from 

 Port-Vendres, the largest specimen being only 11™?* long. 



In some specimens the furcate setse extend to the last 

 segment, to the complete exclusion of the compound setae ; 

 in others both furcate and compound setae occur on a vari- 

 able number of posterior segments, while on others again, 

 the compound setae entirely replace the furcate on a few 

 of the posterior segments. 



Common on Oysters at low water, and on dredged 

 shells, from 4 to 12 fathoms. 



Syllis fragilis n. sp. 



PL. IT, FIGS. 45,43. 



Head convex, anterior and posterior margins nearly 

 straight lines, passing into the rounded lateral margins. 

 Width double the length. 



Eyes six. Anterior pair mere specks just outside the 

 bases of lateral antennae; middle pair at posterior third 



