of the Virginian Coast 267 



GENERA INCERTiE SEDIS. 

 CABIRA 71. gen. 



Sides of head produced into thin plates, which are 

 covered with papillae. First segment with two pairs of 

 tentacular cirri, without setae. Dorsal cirri on all seg- 

 ments; no ventral cirri. Ventral setae, stout hooks be- 

 ginning on the 6th setigerous segment, one to each ramus. 



Cabira incerta n. sp, 



PLATE XI, FIGS. 155-157. 



Head convex above and below, bluntly rounded in front, 

 lateral margins prolonged into membranous expansions, 

 which project in front of the head, and are densely covered 

 with minute papillae. Antennae two, minute, arising from 

 a short swollen base, lateral, situated at the anterior 

 third (f. 154). 



Buccal segment, in length about equal to the two follow- 

 ing segments; no setae; two minute tentacular cirri on 

 each side; separated from the following segment by a 

 deep lateral constriction. 



Feet. Dorsal ramus with a small dorsal cirrus ; similar 

 in all respects to the antennae and tentacular cirri ; beneath 

 this arise from two to four delicate capillary setae (f 157, 

 a, b). Ventral ramus a small papilla, from the summit of 

 which issues a strong hooked seta (f. 156). The first five 

 setigerous segments have only the dorsal rami. 



Body convex above, flat below. Posterior part not 

 seen. 



Length of part examined (40 segments), 12°™. 

 Color, light gray. 



Found living in a fragment of loosely compacted sand- 

 stone. Dredged. 



