44 Annelida ChceUypoda 
gular ; lower lip slightly largest. In the posterior half of 
the body the length of the feet equals the width of the 
segments ; not quite so long in front. 
Dorsal cirri, longer than feet : none on first setigerous 
segment ; first shorter than second. Base cylindrical ; 
appendix conical or fusiform, tapers rapidly to a pointed 
extremity, forms about one-third the entire length of 
cirrus. Constriction between the base and the terminal 
article very deep. Blood vessels and seta very apparent 
in the cirrus. 
Ventral cirri, arising at middle line of the foot, do not 
reach quite to the end of the foot. 
Anal cirri : upper made up of four articles, subulate ; 
lower, one article, similar in all respects to basal article of 
upper cirri. 
Body, widest at anterior third, diminishing slightly in 
front, and more rapidly behind. Convex above, flat below ; 
segmentation well marked. 
Setae : the terminal article of the compound setae is 
much shorter and stouter than in S. pallidus Verr. ; fig. 90 
represents a form occasionally seen in the anterior feet. 
Simple setae of the upper bundle long, delicate, with one 
edge minutely denticulated. 
Color, yellowish-white ; between the segments a narrow 
red line ; a similar line crosses each segment, sometimes 
falling a little short of the base of the feet. Just outside 
of each posterior eye is a crescentic red line bounding a 
clear white spot; while just back of each posterior eye is 
an irregularly curved red line, also limiting a clear white 
spot. Anal segment with a quadrangular clear white 
spot. 
Length of a large specimen, 20°"° ; diameter, 2°"°. 
Numerous, of all lengths from 4 to 20°™. On shells, 
etc. Dredged. 
