246 



Annelida CJicetopoda 



distant from each other. The same number and arrange- 

 ment holds for the ventral surface. On the anterior seg- 

 ments these papillje are situated near the anterior margin, 

 and besides those in regular series are numerous smaller 

 ones which project forward from the front of the segments. 

 On young specimens there may be but three series of 

 papillae. 



The pedal rami are far removed from each other. They 

 are surrounded by papillaa similar in all respects to those 

 on the body, in number fi'om 4 to 8. Back of each fascicle 

 of setae is an elongated cirrus (or papilla) slightly swollen 

 at base; this is somewhat larger and longer in the dorsal 

 than in the ventral rami. 



Setae. The dorsal set^e are all similar to f. 95, save that 

 those of the lirst live segments and particularly of the first 

 three are very long. The ventral setae of the first three 

 segments are like the dorsal. On the fourth segment 

 minute terminal hooks appear with a straight tooth below. 

 They shorten backward and the hooks enlarge as in figs. 

 96 and 97. Dorsal setae amber-yellow : ventral setae, at base 

 dark reddish-brown, becoming lighter externally. 



Body covered with fine sand, closely adherent. 



Fam. CH^TOPTERID^. 



SPIOCH^TOPTERUS ^Sars). Char, emend. 



Sars, in his diagnosis of this genus, limits the segments of 

 the middle region of the body to two. The following species 

 agrees so closely with Spioch^topterus in most respects, 

 that it seems undesirable to form a new genus for it ; the 

 middle region, however, is composed of 20-23 segments. 

 Sars also makes the absence of eyes a generic character ; 

 but the presence or absence of eyes seems, at least among 

 annelids, never to have more than a specific value. 



