50 



extremely thick non-collapsible walls which are densely packed with large 

 warty spicules. The canals branch near the capitulum, and connect with 

 the polj-ps by means of small solenia. 



The polj'ps are situated all over the capitulum, few in number, of a large 

 size, and arising like the disc florets in the Compositas (fig. 1). Each 

 consists of a very distinct verucca, which is supported by large longitudinally 

 arranged spindles. The apices of tliese project, and form strong protection 

 to the retracted anthocodia. The oral openings of the verrucas are about 

 5 mm. apart, but the bases overlap slightly. 



The anthocodise are all retracted within the verrucee. 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 " croAvn " and eight distinct " points." The " crown " consists of about 

 twent3--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 fovir pairs of slightly 

 bent spicules which are arranged loosely en chevron. There are usually 

 a few small scattered spicules between the "points." ArVhen 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 verrucas 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 anthocodiee 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 ; 2-5 x 0-36 ; 12 x 0-2 ; 09 x 0-2. 



(b) VerruciB, 2-8 X 0-4 ; 2ox0-3; 1-2.5 x 0-2. 



(c) Anthocodiae, 0-9 x O'l ; 0-85 x 007 ; 08 x 0045 ; 0-5 x 005. 



(d) Tentacles, 01 2x0-04; 004x002. 



