204 



Coenencbyma : (1) A thick conical rugose spine from one end of which 



warty projections arise. The latter vary much in 

 shape and direction and are often branched. 

 Total length, 0-5 0-4 0-35 



Total breadth, 0-25 025 025 

 Length of .spine, 02 02 015 

 Breadth of spine, 01 1 01 

 These pass by gradual transitions to 



(2) Very warty clubs, 04 x 025 ; 03 x 02 ; 0-25 x 015. 



(3) Irregular forms, 0-35 x 0-25 ; 0-3 x 0-25 ; 0-25 x 0-15. 



(4) Warty spindles, 0-8 x 0-2 ; 0-5 x 0-1 ; 04 x 0'05 ; 0-3 x 



005; 0-2 X 003. 

 Anthocodiaj : — 



Collaret: curved spiny spindles, 0-3 x 0-02 ; 0-25 x 0-02. 

 Points : spindles, bent at the base like golf -clubs, 25 x 0'02 ; 

 0-2 X 002. 

 Locality : An damans. 



Echinomuricea indica, n. sp. 

 Plate III. figs. 2 and 3 ; Plate VIII. fig. 4. 



To this species we refer two small complete colonies each with a disc of 

 attachment ; the largest is (55 mm. in height and 70 mm. in maximum breadth. 

 They are both of a brown colour, but the larger is of a darker shade than the 

 other. The branching is confined strictly to one plane, but owing to the sinuous 

 nature of the branches the whole presents a characteristic appearance. The 

 branches generally arise at right angles, and though maintaining their original 

 direction curve and fliex so as to be almost semicircular or S-shaped. 



The axis is horny, slender and black ; the surface is very smooth and 

 ghstening. 



The co^nenchyma is moderately thick, and such that the diameter of the 

 stem and branches is almost uniform throughout. It is of a dark brown colour, 

 and when viewed with a lens presents a very spinose appearance, due to the 

 projecting points of the typical tripod-like spicules. 



The polyps are disposed over the whole surface, in some places apparently 

 in spirals, but in others quite irregularly. The verrucee are almost hemispherical 

 with a diameter of 075 to 1 mm. They bristle with the points of j^i'ojecting 

 spicules which are directed upwards and outwards and form a very spinose 

 armature. The anthocoditB are completely retractile. They are furnished with 

 an elongated oesophageal region quite devoid of spicules. Surmounting this is 

 a dome-like spiculose portion which forms the operculum. There is a distinct 



