114 



The stalk is long and straight, whitish in colour, with a pinkish tinge. Its 

 length is about half that of the entire colony (64 mm. in A and 49'5 mm. in B). 

 It shows a number of swellings, three in B, the smaller, and four in A, the larger 

 -i|><'rimcii. There is a very small swelling near the base, a second slightly bigger, 

 and almost touching the first, a third about the middle point of the stalk, and in 

 the largest specimen (A), a fourth swelling at a point three-fourths the length from 

 the base. 



The following measurements were taken : 



Owing to the contraction of the coenenchyma the tip of the axis projects at 

 the basal end. It is thin and thread-like, and is coiled several times into a sort of 

 spiral. 



The crimson-lake colour of the rachis and pinnules presents a striking contrast 

 to the whitish or pinkish colour of the stalk. The lower pinnules, varying in 

 number from 3-5, are small and rudimentary in all the specimens, the lowest 

 being recognisable only as a band of slightly darker spicules lying across the 

 sides of the rachis. The fully developed pinnules are long, narrow, sword-shaped, 

 with calyces on their edges. They are covered by long spicules arranged parallel 

 to the length and closely packed together, forming a complete casing. The calyces 

 stand not at right angles to the pinnule, but at a small angle, and have their apices 

 directed towards the distal end. Each calyx is formed of longitudinally disposed 

 spicules similar to those of the pinnule, and has its apex divided into eight points, 

 each of which is made up of at least two spicules. The calyces reach a height of 

 4'1 mm. The autozooids are capable of complete retraction within the calyces. 

 Each tentacle has on its aboral surface a broad band of spicules which are arranged 

 more or less longitudinally. 



Along the prorachidial surface there is a broad band free from autozooids. 

 This band is divided into two smaller bands by a long narrow furrow which extends 

 the whole length of the rachis. The band is closely covered by numerous siphono- 

 zooids, each of which has a small calyx which is closely appresssd to the surface of 

 the rachis, and thus appears only as a platform of spines lying at an acute angle 

 to the surface, with the apex directed towards the tip of the rachis. On the 

 metarachidial surface siphonozooids are also present, forming a single row on each 

 side of the middle line. They are not so closely pressed against the surface. The 



