offhe Virginian Coast 



257 



other. The first two or three are a little shorter than those 

 following them. They exist on 50 to 55 segments, the 

 last two or three having about the same length as the first. 

 After the first few segments they entirely cover the back. 



The anterior dorsal setse form a fascicle just in front of 

 the dorsal cirrus, they are very long, (f 131), regularly 

 acuminate. In each bundle there are two or three in the 

 upper part double the length of the one figured. Back of 

 the branchiated segments, there are only four to eight in 

 each bundle, which are a little shorter and more delicate 

 than the anterior setse. 



Ventral setse (f. 132, a, b.), arranged in three transverse 

 series, numerous, inner third or half of uniform width, then 

 suddenly acuminate, capillary termination very long and 

 delicate. In the upper part of each ramus are a few setae 

 double the length of those figured ; back of the branchiae 

 they form two fan-like series. 



On the anterior branchiated segments, the dorsal and 

 ventral surfaces of the body are very slightly convex. Their 

 convexity progressively increases (f 129) backwards; the 

 sides are rounded (f. 128). On the non-branchiated seg- 

 ments, the lateral and ventral surfaces are regularly rounded, 

 but there is a sudden contraction of the dorsum just above 

 the dorsal rami (f. 130). Posterior segments not found. 



A fragment 32^"™ in length had 170 segments, and was 

 2mm diameter. 



Color : the head is white ; first 30-40 segments bright 

 red, passing into white, which further back passes into a 

 green. Anterior dorsal setae, amber-yellow ; anterior ven- 

 tral, brownish-yellow ; all setae back of branchiae gleaming 

 white. 



Rare ; low water, mud. 



