216 



Annelida Chcetopoda 



(unpaired), a little shorter, and more delicate than anterior. 

 Eyes posterior, lateral, circular, large, black. Of the 

 tentacular cirri those of the first and second pairs are 

 about half as long as the third ; the third (anterior supe- 

 rior), reaches back to the 8tlj or 9th seg ; the 4th about two- 

 thirds as long as the 3d. The first segment is a little longer 

 than the 2d, about equal to the 5th. 



Dorsal cirri, on the anterior segments small, lanceolate 

 (f. 39), becoming broader and heart-shaped (f. 40), while 

 on the posterior segments they become again elongate, 

 pointed, but with basal two-thirds of uniform width. 



Ventral cirri small, lanceolate, sometimes with one 

 straight and one convex side, reaching slightly beyond the 

 feet ; somewhat longer on posterior segments than on 

 anterior. 



Anal cirri about the length of the last four segments, 

 arising from a stout basal article forming about one-third 

 their entire length. Terminal portion, subulate, acute. 

 The extended proboscis is about one-third as long as the 

 body. It increases regularly in diameter from its origin, 

 ending in a crown of papillae. When highly magnified, 

 longitudinal rows of cylindrical papillae can be seen. 



Color of the body, yellowish-white with numerous 

 minute gray spots; appendages white. Dorsal cirri tinged 

 with green. 



On shells ; 5 to 10 fathoms. 



The specimen from which figs. 38, 39, and 40 were 

 made was 3.5™°" long. Another specimen was 10™™ in 

 length ; diameter, 1™™. Number of segments, 65. 



Fam. HESIONID^. 

 PODARKE miers. 

 PoDARKE oBSCURA Verrill. 



Verb. Invert. An. Vin. Sound, etc., p. 589 ; pi. xii, fig. 61. 



Six to twelve fathoms, on shells. Rare. 



