BARBADOS-ANTIGUA REPORTS 53 
tensive submarine mural flower garden. Appearing just above 
sea-level, they continue in a solid mass almost to the bottom of 
the sea-wall. The numerous closely-set branchial filaments have 
a spread of 8 to 10 inches. They are beautifully colored in 
shades of brown with several series of color spots forming 
bands, the color combinations being fuscous brown banded with 
_ light tan spots, chocolate brown banded with white, dark pur- 
ple with brown spots, and dark mahogany red banded with 
light brown. A few are almost white with indistinct barring 
like watered silk. This wonderful display of delicate feathery 
filaments in beautifully blended colors was a source of constant 
admiration to all the members of the expedition. 
DESCRIPTION 
External Features 
The entire length of the specimen here considered is 120 mm., of which 
90 mm. is in the length of the branchie. The body in the contracted 
condition measures 110 mm., but in life it could be extended to a much 
greater length. The maximum width is 20 mm., and the maximum thick- 
ness is 15 mm. The body is hemispherical in cross-section. The ventral 
side is flat, but the dorsal side is strongly arched. There are about 180 
segments. The color of the dorsal side of the body is a reddish-brown, 
with a dark spot on each side of the segments just above the tori, which 
are a tan-brown. The ventral side of the body has a median band, 10 
mm. wide, the color of which is a deeper reddish brown than that of the 
dorsal side. The lateral margins are of the same color as that of the 
dorsal tori. The bundles of yellowish sete are closely set, appearing like 
a yellow stripe along the sides of the body. 
The body is divided into head, thorax, and abdomen. The prostomium 
is compressed and bears two kinds of sense-organs; dorsal tentacles, two 
in number, and palps. Each palp is represented by a number of long, 
mobile filaments, arising from a common base which is set on an E-shaped 
lophophore. The branchial crown is nothing more than the greatly sub- 
divided and enormously elongated palps. There are 80 branchial fila- 
ments, which are united near the base by a delicate web. Each filament 
is provided with secondary processes, called pinne. In addition to its 
sensory functions, each filament aids in conveying food to the mouth by 
the action of the pinne. The branchie are respiratory organs. The 
peristomium does not bear sete or cirri, and it is reflexed to form a 
collar, which is two-lobed. The ends are widely separated on the dorsal 
side, while on the ventral side they are in contact. Each ventral end is 
prolonged into a triangular recurved lobe. 
The thorax has 8 segments. The torus of the first segment is arranged 
obliquely just posterior to the dorsal free end of the collar on either side. 
