46 Annelida Glwetopoda 
distant from each other. The same number and arrange- 
ment holds for the ventral surface. On the anterior seg- 
ments these papillae 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 papillae similar in all respects to those 
on the body, in number from 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 setae are all similar to f. 95, save that 
those of the first five 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^. 
SPIOCHiETOPTERUS {Bars). 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. 
