BARBADOS-ANTIGUA REPORTS | 49 
Family Sabellide—Flexible tubes constructed of silk-like material with 
mud and sand. 
Sabella melanostigma Schmarda 
Plate VII, Figs. 4, 5, and 6 
The body is 47 mm. long including the branchie. It is 6 
mm. wide at its greatest breadth. It gradually decreases pos- 
teriorly. The body is compressed and has 130 segments. The 
color of the body is yellowish-brown. On the side of each seg- 
ment there are two distinct black spots, one dorsal and one 
ventral to the sete fascicles. These spots are larger anteriorly 
on the dorsal side, but reversed posteriorly, where they grow 
smaller and gradually disappear. There is a conspicuous black 
spot on the dorsal side of the buccal segment. They are also 
present on the dorsal basal lobes of the branchie. Under the 
microscope these spots seem to be pigment. Does this indicate 
the presence of eyes on the body? 
The thorax has 9 segments. The ventral groove is missing 
on the thoracic plate. Except for difference in size the fascicles 
of sete are like those of the abdomen to about the fifteenth 
abdominal segment, where the sete change to just the one kind, 
namely—the blade-like form. The tori shorten here, and the 
uncini are small. 
The sete are a glistening yellow, very large and stiff. They 
are of two kinds, grading into each other from a spatulate to a 
simple blade. The latter are the longer and are dorsal. The 
uncini have a comb-like arrangement in the tori, the hooks 
pointing anteriorly. The posterior edge of each torus is widened 
into a membranous fin-like web. The uncini have a long shaft- 
like elongation and are capped with teeth. 
The branchie are brown at the base, but the color soon 
changes to yellow. They are about 20 mm. long. The basal 
lobe is curved in and projects above the collar. There are 19 
pairs of branchial filaments, which are nearly of equal length. 
Each filament bears 4 or 5 pairs of eye spots. The collar is 
low, with a gap between the lobes on both the dorsal and the 
ventral sides. 
This specimen was found in a tide-pool at Needham’s Point, 
Barbados. <A group of these delicately tinted Sabellide thickly 
