325 
1909-10.] On a New Species of Cactogorgia. 
extremely thick non-collapsible walls which are densely packed with large 
warty spicules. The canals branch near the capitulum, and connect with 
the polyps by means of small solenia. 
The polyps are situated all over the capitulum, few in number, of a large 
size, and arising like the disc florets in the Composite (fig. 1). Each 
consists of a very distinct verucca, which is supported by large longitudinally 
arranged spindles. The apices of these project, and form strong protection 
to the retracted anthocodia. The oral openings of the verrucse are about 
5 mm. apart, but the bases overlap slightly. 
The anthocodise are all retracted within the verrucse. They are 
moderately large, and have a dense armature. They are about 2 mm. in 
height and 1 mm. in diameter. The anthocodial armature (fig. 3) consists 
of a “ crown ” and eight distinct “ points.” The “ crown ” consists of about 
twenty-two to twenty-eight rows of slightly curved spicules, which are 
placed circumferentially and interlock closely. Surmounting this there are 
eight triangular “ points,” each consisting of about four pairs of slightly 
bent spicules which are arranged loosely en chevron. There are usually 
a few small scattered spicules between the “ points.” When at rest the 
tentacles are infolded and overlap one another, and when expanded are 
about 1 mm. in length. They are conical in shape, and have a few simple 
pinnules. They contain small scale-like spicules arranged en chevron on 
their aboral surface. 
The spicules vary in shape and character in the various parts of the 
colony. Those of the stalk are for the most part large spindles, some of 
which are almost scale-like (fig. 4). They are covered with large papillose, 
irregular warts. In the verrucse they are predominantly spindles, either 
straight or variously curved (fig. 5). These are also covered with warts, 
but are not so rugose as those of the stalk. 
The spicules of the anthocodise are straight and curved spiny spindles. 
Some of these may bifurcate at one end (fig. 6). 
On the aboral surface of the tentacles there are small scales, irregular in 
outline or with a slight constriction in the middle. The flattened surface 
of these is slightly papillose (fig. 7). 
The following are some of the measurements of the chief types, length 
by breadth, in millimetres : — 
(a) Stalk, 2-5 x 0*4 ; 2-5x036; 1-2 x 0-2; 0-9 x 02. 
(b) Verrucse, 2*8 x 04 ; 2*5 x 03 ; 1-25x0-2. 
(c) Anthocodise, 0*9 x OT ; 0*85 x 0*07 ; 0*8 x 0-045 ; 0*5 x 0*05. 
(■ d ) Tentacles, 0*12 x 0-04 ; 0*04 x 0 02. 
