228 



Annelida Ghcetopoda 



in Autolyius hesperidum; very thin, and the dividing line 

 above not well marked, but existing. 



Eyes small, circular, umber-brown, on the posterior 

 part of the head, four in number ; the anterior pair lateral, 

 the posterior pair just within the anterior, very near the 

 posterior margin of the head, smaller than the anterior. 



Antennae : the median arises between the anterior eyes, 

 and when turned backward, reaches to the 8th segment ; the 

 lateral arise just in front of the anterior eyes, and are from 

 one-third to one-half as long as the median. 



Tentacular cirri : the superior about as long as the 

 lateral antennae ; inferior one-half as long. 



First dorsal cirrus, nearly as long as median antenna. 

 Second dorsal cirrus, one-half as long as first. 



The antennae and tentacular cirri habitually coiled in a 

 flat or a conical spiral. Antennae, all superior cirri, and 

 anterior margin of palpi, with numerous short, stiff hairs. 



Dorsal cirri, a little less than width of body in length. 



Anal cirri, two in number, a little longer than the longest 

 dorsal cirri. The antennae and all the cirri are irregularly 

 wrinkled, and have nearly the same diameter from end to 

 end. 



The proboscis terminates in rounded fleshy lobes ; the 

 oesophagus, in a circle of flattened triangular papillae. It 

 extends to the 8th ses^ment, doubling twice on itself just 

 before entering the stomach. The stomach occupies from 

 three to four segments. 



Feet large, fleshy, cylindrical, bilabiate, anterior lobe 

 slightly longer than posterior ; incision between the lobes 

 very shallow. They originate along the line of union of 

 the lateral and ventral surfaces, and are directed downward. 



Setae arranged in a single series, and directed downward 

 and backward ; on the anterior segments about twelve to 

 each foot, decreasing in number backward, till on the last 

 segments there are only three or four. Body very convex 



