101 



flattened spindles and vary from 015 to 027 mm. in length. On the aljoral 

 surface of each tentacle there are two rows of small spicules. 



The StiitzbQndel is well developed, forming a sort of sheath to the back 

 of the ]»olyp-stalk and having spicules which measure up to 3 nun. in 

 length. Two in each bundle always project beyond the polyp, one for 12 

 null. 



Cortical si)icules : (a) In the stem there are straight or curved spindles 

 and a few V-, L- and Y-shaped forms, all having numerous regularly arranged, 

 simple or branched warts. The spindles measure up to 3'0 mm. in length and 

 ((•4 mm. in breadth. There are also smooth, flat, spindle-shaped to irregular 

 star-shaped forms. They have an irregular transverse arrangement on the stem 

 and principal branches, but tend to lie more longitudinally in the smaller 

 branches and twigs. 



{//) In the stalk there are straight or curved spindles, clubs, three-rayed 

 forms, triangular and oval-shapetl and irregular forms, all thickly covered with 

 regularly arranged rough and often branched warts. The spindles average 

 about 1 nun. in length and 0'27 nun. in breadth. In addition there are flat, 

 spindle- to star-shaped forms with very few warts. Among the irregular forms 

 there are almost globular forms, irregular spindles, and dumb-bell-shaped forms 

 with two whorls of rough warts and a short free space, irregular star-shaped 

 forms, and a few spherical forms that rise on the top of a tripod-like arrange- 

 ment of short processes. 



Canal-wall spicules : (a) In the stem there are large spindles, three- and 

 four-rayed forms. The spindles measure from 08 to 30 mm. in length and 

 from 0"24 to 048 nmi. in breadth, and are covered with numerous rough warts. 

 The three-rayed forms measure about 18 mm. by 12 mm. and the four-rayed 

 forms about 0'48 mm. by 042 mm. ; both have rough warts. In addition 

 there are small, smooth, irregular, spindle-shaped bodies. 



(h) In the stalk there are thick spindles, three-, four- and five-rayed forms, 

 four-rayed forms in which one of the rays rises in a plane at right angles to that 

 of the other three, and six-rayed forms in which two rays rise at right angles 

 to the plane of the other four, one on each side. There are all shapes of three- 

 and four-rayed forms ; in the latter two of the rays may be quite close together 

 and the other two widely divergent, in the former the shape often approaches 

 a T. All are covered with multituberculate to branched warts. In addition 

 there are smooth, flat, spindle-shaped to star-shajjed forms. The rough 

 spindles average about 1'8 mm. in length and 0'48 mm. in breadth. 



Colour — The stalk is bright pink ; the stem light orange-yellow ; the re- 

 maining parts white. 



Locality : Andamans. 



