260 



Annelida Chcetopoda 



The second segment bears branchise and laterally an 

 acutely conical process with a flattened triangular base ; 

 a bundle of setae, similar to those of the first segment, 

 arises from the lower margin of this process near its base. 

 There are no other setae on this segment. Accordingly, 

 the first two segments are uniramous having only the 

 ventral rami and setse. The pedal ramus of the second 

 segment is very close to the setigerous lobe of the first, 

 being on the antero -lateral margin of its own segment. 

 Without careful examination it would seem that both 

 rami belonged to the first segment. 



The dorsal setse of the third segment (f. 136) are smaller, 

 but do not differ otherwise from those of the fourth and 

 fifth (f. 137). Those following the fifth segment have 

 four sharp teeth increasing progressively in length (f. 138). 

 Branchise, about twenty pairs ; sixth or seventh largest, 

 growing smaller gradually, the last being quite short. 

 Length of anterior branchise a little more than the width 

 of the body. 



Color : opercular lobes white with dark brown specks ; 

 first three or four segments black laterally sometimes 

 ventrally ; body generally white, often with a greenish 

 tinge : branchise white or red with green centre : caudal 

 appendage green : feet generally white, with sometimes 

 the outer border of the posterior dorsal rami black. In 

 a well marked color variety, the first four segments were 

 entirely black; body green with brown spots; middle 

 third, ventral surface, dark brownish-red ; feet light green 

 at base, passing into dark brown externally. 



Length, from 8 to 18^^. 



The tubes of this species were numerous on shells, etc., 

 dredged from four to twelve fathoms. 



