of the Virginia?! Coast. 17 
Fam. SYLLID^. 
SYLLIS (Sav.) Ehlers. 
Syllis gracilis Gruhe. 
Qrube. Actinien, Echinodermen und Wiirmer, p. 77. 
Clatarede. Glanures Zootomiques parmi les Anuelides de Port-Vendres, 
p. 75, pi. V, f. 3. 
Claparede. Annel. Chetopodes du G. de N., p. 503, pi. xv, f. 3. 
Marion et Bobretzky : in Ann. des Sciences Naturelles, 6tli series, vol. 
xi, p. 23, pi. ii, f. 6. (1875.) 
The specimens from Virginia agree perfectly with the de- 
scriptions given by Grube and Claparede. As remarked 
by Marion and Bobretzk, the figures of the furcate setse 
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 with -S*. gracilis Gr. 
They are, however, smaller than even those described from 
Port-Vendres, the largest specimen being only H™™ 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 fraqilis n. sp. 
PL. IV, FIGS. 42, 43. 
Head convex, anterior and posterior margins nearly 
straight lines, passing into the rounded lateral margins. 
Width double the length. 
Eves six. Anterior pair mere specks just outside the 
bases of lateral antennae; middle pair at posterior third 
