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project as a fringe of teeth around the circular verruca-opening, fitting closely 

 together and so becoming inconspicuous when closed. The anthocodiie are 

 complete!}^ reti-actile and are lilack in colour. The tentacular operculum is 

 feebly developed, consisting of eight triangular lobes at the base of the tentacles, 

 surmounting a collaret of three or four rows of curved spindles. Each of the 

 triangular parts consists of four spindles, in pairs, enclosing acute angles point- 

 ing towards the distal end of the tentacle, on which small spicules are arranged 

 transversely. The axis is cylindrical. It is solid and of a dark brown colour 

 at the base, but hollow and pale yellow in the younger parts. 



The spicules present the following types, with measurements length by 

 breadth in millimetres : — 



(a) Coencnchyma: (1) Scales, U-6 x 0-3 ; 0-6 x 0-25 ; 0-5 x 0-22 ; O'O x 0-2 ; 



0-3 X 0-3. 



(2) Scale-like forms with x-shaped marking in the 



middle, 0-22 x OT ; 0-2 x 0-08. 



(3) Thick warty spindles, 04 x 0-15 ; 04 x 01 ; 



0-22 X 0-08 ; 22 x 06. 



(h) Anthocodic^: Spiny spindles, 0-22 x 0-02 ; 0-2 x 0-02. 



(c) Tentacles : Small scales and irregular crosses with x-shaped marking, 

 01 X 0-075. 



Several other specimens taken in the Andaman Sea, 53 fathoms, agree 

 in every way with the above species except in the spicules which are smaller, more 

 circular and more regularly disposed, forming a granular uniform layer. 



Four beautiful colonies in the Wood-Mason Collection agree in detail with 

 the above species. The largest and most complete is 180 mm. in height and 

 90 mm. in maximum breadth. It is almost pure white in colour and presents 

 a beautiful tessellated structure. The verructe stand out from the coenen- 

 chyma as small domes. The coenenchyma is thick, especially in the smaller 

 branches ; consequently there is little variation in the diameter of the main 

 branches and twigs. Most of the secondary branches arise perpendicularly 

 but soon diverge to a direction almost parallel to the main branches which are 

 very much elongated. 



Localities : Andaman Sea, 53 fathoms ; off Puri, Rocky Bank, 10 fathoms ; 

 off Ganjam Coast, 10 fathoms. Previously recorded from Trincomalee, Ceylon ; 

 deep water off Galle, Ceylon. 



Acis indica, Thomson and Henderson. 



To this species we refer a much damaged specimen 60 mm. in height and 



60 mm. in maximum breadth. The main stem is broken near the base. The 



branching is very sinuous, some of the branches being almost S-shaped. They 

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