BARBADOS-ANTIGUA EXPEDITION 107 
diameter with numerous tentacles in three or four series or 
whorls. The body is columnar in shape with two rows of reddish 
brown eyespots around the base. The general color is reddish 
orange. 
But the most interesting actinian collected by us was entirely 
different from anything we had ever seen figured or described. 
It invariably lived as a symbiont or commensal imbedded in 
coral or coral rock, usually in the bottom of a deep fissure or 
eavity far from the surface. This strange creature sometimes 
attains a total spread of as much as four centimeters, although 
it would shrink to almost nothing when retracted. 
There was an outer set of six very stout clavate tentacles, ut- 
terly different from any I had ever seen before. They were 
usually more or less rigid in posture, put capable of consider- 
able flexion or retraction, sometimes appearing simply club- 
shaped, like an Indian club, and then a swelling would appear 
near the base of the head of the club and grow larger and larger 
until the characteristic forked or clavate head would appear. 
These tentacles were dark brown in color, abruptly capped by a 
purple termination consisting largely of nematocyst batteries. 
One of them measured 1.8 centimeters in length. These struc- 
tures have doubtless some peculiar function, but we were unable 
to discover it, although histologically some of the cells look like 
gland cells. We did not notice, however, that they were partic- 
ularly adhesive. 
Inside of the circle of these large tentacles and implanted on 
the oral surface of the disk were a large number of translucent 
lanceolate tentacles, very delicate and sensitive, often drawn 
out to a fine point at the end, and usually in more active move- 
ment than the clavate tentacles. The oral disk was quite trans- 
lucent, as was the short brownish columnar base. The diameter 
of the body was about two centimeters. 
This species seems hardy and lived well in the laboratory for 
several days. Excellent photographs were secured by Mr. 
Ricker showing them in various positions and stages of expan- 
sion and retraction. One set of tentacles would at times be 
fully expanded, while the others were retracted. While under 
observation this species was seen to give off planule which were 
secured and preserved. Taken all in all, this is one of the 
