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15- Siphonogorgia hicksoni (=■ Chironephthya hic-ksoni Harrison, 1908). 
(1) Crown — about 5 rows of spicules. 
Points — 2 or 3 spicules en chevron, and. smaller ones irregularly disposed between them. 
(2) Not described. 
(3) Anthocodiae not retractile. 
(4, 5) Not described. 
(6) Very slight branching. Branches short and thick. Polyps more numerous on the terminal twigs. 
Colour — uniform dull yellow, but with a deep purple in the tentacles. 
Locality: Admiralty Islands. 
16. Siphonogorgia indica (= Chironephthya indica Thomson, 1905). 
(1) Crown — 5 rows of spicules. 
Points — 3 pairs of spicules en chevron, the two outermost enclosing the others. 
(2) Scarcely any verrucae, anthocodiae nearly flush with the general surface of the branch. 
(3) Anthocodiae almost completely retracted. 
(4) 4 canals seen in cross-section. 
(5) Large rough spicules, mostly ‘curved in a slightly s-shaped manner, reddish-brown and light- 
brown in colour. Slender small spicules also occur, very small colourless ones with long 
spines occur in the canal walls. 
Locality : Ceylon Seas. 
17. Siphonogorgia intermedia Thomson and Henderson, 1906. 
(1) . Crown — about 3 rows. 
Points — 4—5 distinct pairs diverging into a brush-like apex. 
(2) Not described. 
(3) Some of the polyps well expanded, others all but completely retracted into the coenenchyma. 
(4) Not described. 
(5) Cortical spicules slender, with a few rough warts, the inner spicules of the stem strong and 
closely covered with warts. Some of the spicules bifid, or slightly branched at one end. 
(6) Four finger-shaped lobes on a short trunk, a few relatively distant polyps all round each lobe. 
Colour — cream. 
Locality: Zanzibar shore. 
Note. Quite unlike other known forms of Siphonogorgia, but with well-developed antho- 
codial armature, and walls of stem canals supported by numerous spicules. 
18. Siphonogorgia kollikeri Wright and Studer, 1889. 
(1) Crown — not described. 
Points — 4—6 converging spicules. 
(2) Verrucae prominent, large, blunt, cone-shaped, standing at an acute angle to the branch. 
(3) Anthocodiae retracted. 
