THE BRISTLE-WORMS. 



123 



Cirratulus. 

 Tercbella. 



Pedinaria. 

 Trophonia. 



Dasyclione. 

 Pomatoceros. 



Sabellaria. 



CHARACTERS OF SPECIES. 

 Fam. Nereidse. 



Nereis. In N. pelagica the back is strongly arched, the palps are 

 long, the peristomium or first segment is twice as long as the 

 second. In N. dumerilii the cirri are very long; the longest 

 of those borne on the peristomium reaches to the fifteenth 

 segment. In N. cultrifera the dorsal cirri are short and the 

 back flattened. In N. fucata, the posterior feet differ from 

 the anterior, and have a long, arched dorsal lobe. In 

 N. virens the dorsal lobes of all 

 plates. 



Fam. Nephthydidse. 



Nepldhys. In N. Jwmbergii the head is pentagonal, with four 

 minute tentacles; palps are absent. The peristomium has a 

 rudimentary foot and a cirrus, but otherwise there are no 

 dorsal cirri. Lobes of feet widely separated, with curved 

 gill between. 



the feet bear large leafy 



