FBOM THE INDIAN AND PACIFIC OCEANS. 33 



10. Chironephlhya bengalensis, Thomson .... Andaman Islands. 



(Stereacanthia indica.) 



11. ,, flavocapitata, sp. n Macclesfield Bank, Admiralty Islands. 



1.2. „ purpurea, sp. n Tizard Reef, Admiralty Islands. 



13. „ planoramosa, sp. n Macclesfield Bauk, Admiralty Islands. 



14. „ hicksoni, sp. n „ „ „ „ 



15. „ gracilis, sp. n Admiralty Islands. 



16. „ annulata, sp. n ,, „ 



17. „ relractilis, sp. n „ „ 



18. „ siphonogorgica, sp. n Indian Ocean. 



Chironephthya variabilis (Hickson). (PI. 3. figs. 6, 7 ; PI. 6. figs. 48, 49, 50, & 51.) 



The examples of this species are all broken fragments ; no single colony is complete; 

 but I do not hesitate to put them with this species, on account of their general form and 

 mode of branching, the size and form of the spicules and their arrangement on the 

 authocodiye. The colour is very variable ; my three specimens differ, and all are 

 different from the seven varieties described by Hickson : — 



A. — Stem and branches pale yellow ochre, becoming slightly deeper in the terminal 

 twigs. Polyps orange. 



B. Three varieties. — In all stem and branches are red, becoming deeper red in the 

 terminal twigs. Polyps bright yellow, pale yellow, and white respectively. 



C. — Stem and branch pale pink. Polyps pale yellow. 



Since the pieces are all somewhat fragmentary it is not possible to give exact measure- 

 ments of their size. Probably A was about 6-0 cm. long and B slightly larger. The 

 fragment C consists only of the base of a colony broken off at a height of 1'5 cm., with 

 a single branch given off at about 075 cm. The spicules from the wall of stem and 

 branches are spindles covered with warty projections. The measurements will be found 

 tabulated below. Spicules of partition-walls elongate spindles nearly colourless in A, 

 and pink in both B and C ; also small very numerous thorny spindles, orange, red, and 

 pink, in A, B, and C respectively. Hickson describes about ten rows of parallel transverse 

 rows of spicules in the crown of the anthocodia. I cannot count so many in any of mine, 

 six or seven being the maximum ; but in his figure he only draws the latter number. 

 The arrangement of the point-spicules is variable ; the polyps figured on PI. 6. figs. 49 

 <fc 50 are both from tlie same terminal twig, but it is generally possible to trace four 

 spicules arranged en chevron, of which two are considerably larger. 



Sab. Bay of Bengal. 



Chironephthya pendlla, var. bengalensis, var. n. (PL 3. fig. 8; PI. 5. figs. 41, 

 42 ; PI. 6. fig. 58.) 



Siphonogoryia pendula (Studer). 



Three fragments 6-0, 50, and 25 cm. in length respectively, probably all portions of 

 the same colony. Stem erect, cylindrical ; branches and upper part of stem deeply 

 grooved. Polyps clustered on apices of terminal twigs also occur all along branches, and 



SECOND SERIES. — ZOOLOGY, VOL. XI. 5 



