51 



a little apart from tlu; smaller there is usually a second si)icule. On the aboral 

 surface of each tentacle there are two rows of flat, blunt-toothed spicules which 

 are j)laccd horizontally, although just at the base of the tentacle they are ar- 

 ranged longitudinally. The lower polyp-spicules measure on an average 0'27 

 mm. in length, and the upper projecting spicules O-dCy mm. and may project 

 beyond the polyp for a distance of 0*48 mm. although 0'3 mm. is the average. 



The Stlitzbundel is well developed, and consists of a number of spicules 

 which converge towards the base, while three or four project for a short 

 distance. They average in the smaller polyps about 1 mm. but in the larger 

 they reach a length of 3 2 mm. and project 1'2 mm. beyond the polyp. 



Cortical spicules : {n) In the stem the spicules are long, slender spindles 

 with simple regularly arranged spines. A few spindles l)lunt at one end and 

 with slightly longei- branched spines, and a few small three-rayed forms with 

 l)lunt spiny projections are also present. The spindles vary in length from 0'35 

 to 30 mm. and in breadth from 003 to 0'15 mm. The spicular arrangement 

 in the stem and branches suggests chopped hay, and this is continued more or 

 less up to the smaller branches where the arrangement tends to become uni- 

 formly longitudinal. 



(l)) In the stalk the spicules are very varied, blunt spindles, clubs, curved 

 spindles with a band of huge warts near the middle, irregular branched forms 

 with three, four, five or more branches, and numerous irregular forms. All are 

 characterised by the large number of huge simple or compound spines and 

 large multituberculate warts. 



Canal-wall spicules : (a) In the stem there are numerous flat, smooth 

 spindle-shaped to star-shaped forms. 



[/>) In the stalk the spicules are similar to those of the canal walls of the 

 stem with the doubtful addition of a very few small ordinary spindles. 



Colour — The stalk, stem and branches are white to semi-transparent ; the 

 twigs and polyp-stalks orange-yellow ; the polyps white. 



Locality : Andamans. 



The smallest specimen has two flattened, leaf-like branches which are 

 reflexed and form a collar, and the polyparium is greatly flattened. This 

 specimen agrees in all essential details with the two larger and is evidently a 

 young specimen. 



This new species belongs to the rigida group and is not far removed from 

 D. rosea. 



Dendronephthya foliata, Henderson. 

 The colony is divaricate and presents a beautiful regular oval outline, the 

 principal branches being of about the same size. It is 7 cm. high and 6 5 cm. 

 broad. 



