12 Annelida Chcetopoda 
cle originates a little outside of and behind the attach- 
ment of the elytra. Ventral ramus of foot stout, elongate, 
conical, widely excavated for the transmission of the setae, 
and obliquely truncated from above downward. Dorsal 
ramus a mere papilla. Setae of dorsal ramus (f, 31) few, 
delicate, tapering gradually to a minute capillary ending, 
one edge finely denticulated. One stout concealed acicula. 
Ventral setae in two bundles ; superior with one or two 
stout setae (f. 29) usually with bluntly rounded apex, 
beneath which for a short distance one edge is minutely 
denticulated. In the upper bundle there are also from 
one to three bidentate setae. Below the apex on each side 
is a series of rather long sharp teeth, from 6 to 8 in num- 
ber. These setae are not quite so large as those mentioned 
above. In the lower bundle are from 6 to 12 bidentate 
setae e\;ery way similar to those of the upper, but a little 
more delicate (f. 30). All the setae however are stout 
and long, except those of the anterior feet which are de- 
licate. 
The first ventral cirrus is in all respects similar to the 
dorsal cirri ; its basal article is long, and arises from the 
base of the foot. After this one they originate at the 
inner third of the foot from a small papilla. They are 
minute, conical. At the outer posterior angle of each 
segment, below, is a small cylindrical papilla, projecting 
backward and downward, not visible on a few of the 
anterior segments. 
Facial papilla. Just in front of the mouth, beneath the 
base of the median anteima is a small, facial tubercle or 
papilla, bluntly rounded externally. Anal cirri two, 
similar to dorsal cirri. Body very slightly convex above 
and below. 
Color. When divested of the elytra the dorsal surface 
is usually reddish-purple, with narrow bands of darker 
purple between the segments. Some specimens again are 
