182 Dr. R. Greeff on Autolytus prolifer. 
referred to in the description of the genus. The tentacles, as 
also the following tentacular and dorsal cirri, are usually 
greyish yellow, with the exception of the apex, which is some- 
times light yellow. The whole of the tentacles and cirri are 
more or less densely clothed throughout their length with fine 
soft bristles (tactile hairs), and exhibit in their interior peculiar 
sharply outlined corpuscules, of a roundish, elongated, or irre- 
gular form. 
The cephalic segment is followed by the first body-segment, 
which is very narrow (especially when seen from above) and 
bears on each side two rather short tentacular cirri, but no 
setigerous paddles. It is only on the second body-segment, 
which is considerably broader than the first, that a short uni- 
ramous paddle, with two slightly prominent lobes, makes its 
appearance on each side. In the paddle there is a bundle of 
from eight to ten closely approximated strong and short 
sete. ‘Two of the sete fund these are the strongest and 
usually placed rather behind the rest) are simple, the others 
are composite. ‘The simple sete have exactly the form of the 
composite ones, except that in the former the sickle-shaped 
terminal joint is wanting, and the otherwise short apical por- 
tion is somewhat elongated, especially on the hinder segments. 
The composite setee bear the short tridentate terminal joint 
already described in the generic character (fig. 3). Above the 
paddles of the second segment there is on each side a long 
dorsal cirrus resembling the cephalic tentacles. The dorsal 
cirri of the following segments are considerably shorter. All 
the dorsal cirri consist of two joints—a short, conical, tuber- 
culiform basal, and a thinner terminal joint. In all the cirri 
the basal joint shows a lively ciliary movement, but this never 
extends over the terminal joint. Ventral cirri are deficient on 
all the segments. ‘The caudal cirri are usually long, and fur- 
nished with many tactile hairs. 
With regard to the characteristic alimentary apparatus, es- 
pecially the cesophageal tube, I may refer in general to the 
description already given under the generic character, and to 
the figure (fig. 1, a, b,c). Usually the cesophagus commences 
in Autolytus prolifer within or below the second setigerous 
segment. The glandular stomach commences at the eighth or 
ninth, and generally includes two or three segments in its 
length. ‘The intestine is broad, and presents no constrictions 
corresponding with the individual segments; but at every two, 
three, or four segments there is a constriction, which, however, 
does not penetrate deeply. The head and body present a 
yellowish-brown coloration, sprinkled with dark-reddish-brown 
irregular small granules, spots, and streaks. Frequently also 
