AET. 2. A NEW ANNELID FROM ALASKA TEEADWELL. 3 



cirrus is clearly swollen at the base. A single acicula extends into 

 each half of the parapodium. 



A parapodium from the middle of the body (fig. 2) shows well 

 separated notopodial and neuropodial portions, with aciculae which 

 are very slender. The dorsal lobe of the notopodium is the larger, 

 and carries the long slender cirrus at about midway of its length. 

 The ventral lobe of the notopodium is asymmetrically lanceolate in 

 outline, and a bilobed setal portion lies between it and the dorsal lobe. 

 In the neuropodium the dorsal lobe is bluntly truncated at the apex, 

 and the acicula reaches the surface at about its middle. The ventral 

 lobe has a rounded apex, and the cirrus, with a swollen base, is 

 attached to the body wall at a little distance from the neuropodium. 



The setae are of two kinds. One (fig. 3) with a heavy basal por- 

 tion, the apex asymmetrically bifid, the terminal portion rounded at 

 the apex, with a row of fine hairlike processes along one edge. The 

 other (fig. 4) has a more slender basal portion, symmetrically bifid 

 at the apex, the terminal joint slender and flattened, much longer 

 than in the first type, and with minute hairlike processes along one 

 margin. There seemed to be variations in the size of the terminal 

 joints, but, owing to the loss of many of them in the preservation, I 

 could not get accurate information on this point. Those of the second 

 group make up the notopodial tuft and the dorsalmost of the neuro- 

 podial one. Those of the first group occur in the ventral part of the 

 neuropodial tuft. 



