of the Virginian Coast. 



247 



Spioch^topterus oculatus n. sp. 



PL. VIII, FIGS. 98-102. 



Anterior region composed of the buccal segment and 

 nine setigerous segments. Middle region, 20-23 segments. 



Posterior region, segments numerous, number variable. 



Head (£ -98), sunk in buccal segment and prolonged 

 backward between the bases of the tentacles. The anterior 

 part is trapezoidal, a little wider behind than in front; the 

 posterior narrow part has slightly concave lateral and 

 posterior margins, giving rounded, projecting, posterior 

 angles. The greatest width of the head is a trifle less 

 than its length ; it is slightly convex. In front it is trun- 

 cated, or bent directly downward, its front face being 

 somewhat triatigular, bluntly rounded at the apex, below. 



Buccal segment, forms the anterior part of the body, 

 projecting a little in front af the head ; truncate in front, 

 anterior margin thick, rounded ; lower and lateral surfaces 

 convex; anterior truncated face concave. 



Tentacles, have the usual origin and structure, length 

 20-25°^"". 



Eyes two, lateral, just in front of the bases of the ten- 

 tacles, elliptical, directed obliquely toward the middle line 

 of the head, black. 



Anterior region. The feet are flattened, fleshy lobes, 

 thick at base, running out to a thin edge ; they are dor- 

 sal, transverse, directed upward and a little outward. The 

 setae arise from the front face of the feet, are long inter- 

 nally, growing progressively shorter externally. The outer 

 setfe do not project beyond the foot. The setae also change 

 their form from within outward, as shown in f. 101, a, b, 

 c, d. The peculiar broad seta of the 4th setig. segment is 

 slightly convex, has regular transverse markings, widens 

 near the end. The expanded portion is thickened along 

 an irregular line which divides it into two nearly equal 



