of the Virginian Coast. 



243 



cirri is very indistinct; in alcoholic specimens it is suf- 

 ficiently well marked. 



The ventral cirri arise at the outer third of foot ; at 

 first not extending beyond the foot, but further back, 

 becoming longer, they reach a little beyond the foot. 



The upper anal cirri are filiform, composed of 6-8 slender 

 elongated articles. Their length is about that of the last 

 six segments. 



The lower cirri are cylindrical, and of the length of the 

 basal article of upper cirri. 



The color of my specimens was a uniform yellowish- 

 white. Feet white. 



Length, 14""°^; diameter, 1""°^. 



Found on shells, etc. Dredged, 4-12 fathoms. 



Staurocephalus sociabilis n, sp. 



Pl. VII, FIGS. 89, 90, 91. 



Head short, the width less than that of the first seg- 

 ment, convex above and below, bluntly rounded in front. 



Palpi large, stout, concave below, convex above, mar- 

 gins crenulated ; origin visible from below. Externally 

 they taper slightly, and are longer than the head. 



Antennae, longer than palpi, diameter at base about half 

 that of palpi, subulate, composed of 6-10 articles which 

 are quite variable in form. On the inner half the line of 

 division between the articles is indistinct; outer half, dis- 

 tinct. The terminal article is elongate, fusiform. 



Eyes circular, dark red, anterior pair very large, 

 situated between the bases of the palpi and antennae ; pos- 

 terior pair small, just behind and within the bases of the 

 antennae. 



Feet cylindrical, divided at end into upper and lower 

 lips; upper lip/urther divided into anterior and posterior 

 lobes, all three terminations somewhat flattened, trian- 



