of the Virginian Coast. 



233 



always one black acicula; in the ventral usually but one, 

 sometimes two or three. 



Every specimen found had lost the anal segment. 



Dug at low water; mud and sandy mud. 



Female. In the adult female the first 33 segments corres- 

 pond to those described above. The only change consists 

 in a slio:ht enlarsrement of the eves. Chancres beonnninor 

 with the 34th segment, and completed at the 40th are as 

 follows (f. 65). At the base of the dorsal cirrus a small 

 membranous plate appears. The lingulse, and the lower 

 lip of the dorsal ramus, become flattened lanceolate. In 

 the lower ramus the two lobes of the anterior lip are en- 

 larged and flattened, and an additional circular membra- 

 nous plate appears. At the base of the ventral cirrus a 

 small membranous plate is developed above, and a much 

 larger one below. 



At about the 100th segment, a change to the normal 

 form begins. The dorsal cirrus, upper liugula, and dorsal 

 ramus are first affected, next the lower ramus, and last of 

 all the ventral cirrus. This change is nearly as well 

 marked and sudden as in the anterior part. 



Setfe : in the changed feet, the ordinary setae are nearly 

 replaced by cultrate setae (f. 66), a few, however, remaining 

 in the lower ramus. 



Anal segment elongate, striate above. 



Anal cirri filiform, in length equal to the last eight seg- 

 ments. 



Number of segments, 170 to 220. 



Length, 60 to 80°^: greatest breadth, including feet, S™'^. 



Color : anterior segments pearl-gray ; middle segments 

 blue ; base of feet green ; posterior third of body gleaming, 

 brassy. 



Taken while swimming on the surface from Aug. 1 to 

 Aug. 12. During this time 15 females were taken and 



