FROM THE INDIAN AND PACIFIC OCEANS. 43 



Fig. 23. Spongodes biformata, sp. n. Drawing of a single polyp, showing the way in which the tentacles 

 fold over the oral disc. 



24. Spongodes biformata, sp. n. Drawing of a decalcified portion of a flattened leaf-like branch, 



showing the alternation of long stalked with short sessile polyps. 



25. Spongodes biformata, sp. n. Single spicule from the outer wall of a branch. 



26. Spongodes elegans, sp. n. Group of spicules from the outer wall of the sterile stalk. 



27. Spongodes elegans, sp. n. Group of spicules from the outer wall of a branch. 



28. Spongodes rubescens, sp. n. Spicules from the outer wall of the sterile stalk. 



29. Spongodes rubescens, sp. n. A spicule from the outer wall of a branch. 



Plate 5. 



Fig 30. Spongodes rubescens, sp. n. Spicules from the partition-walls of a branch. 



31. Spongodes rubescens, sp. n. Spicules from the partition-walls of the sterile stalk. 



32. Spongodes chimmoi, sp. n. Spicules from the partition-walls of the sterile stalk. These 



spicules are drawn in situ to show the transverse arrangement. 



33. Spongodes chimmoi, sp. n. Spicules from the partition-walls of a branch. 



34. Spongodes chimmoi, sp. n. Two bright red spicules, somewhat broken, from the partition- 



walls of the branches. These two spicules were found in different branches, but they are the 

 only two of the kind found. They are a very bright red, entirely different from the crimson- 

 red of the branch-spicules of the outer wall. 



35. Spongodes thomsoni, sp. n. Spicules from the partition-walls of the sterile stalk. 



36. Spongodes elegans, sp. n. Spicules from the partition-walls of the sterile stalk. 



37. Spongodes elegans, sp. n. Spicules from the partition-walls of a branch. 



38. Siphonogorgia rotunda, sp. n. Spicule from the outer wall of the sterile stalk. Those from 



the outer walls of the branches are similar. 



39. Siphonogorgia rotunda, sp. n. Spicules from the partition-walls. As in those of the outer 



walls, the spicules of stem and branches are similar. 



40. Chironephthya gracilis, sp. n. Spicules from the outer wall. 



41. Chironephthya pendu/a, var. bengalensis, var. n. Spicules from the outer wall. 



42. Chironephthya pendu/a, var. bengalensis, var. n. Spicules from the partition-walls. The small 



spicules figured here are very characteristic of the genus Chironephthya. Spicules of the 

 same form and size were found in every species (except C. siphonogorgica), the only 

 variation being in the colour. 



43. Chironephthya siphonogorgica, sp. n. a. Spicule from the outer wall ; b. Spicule from the 



partition-walls. 



44. Chironephthya ftavocapitata, sp. n. Spicules from the outer wall. The large spicule is 



coloured pink. 



45. Chironephthya planoramosa, sp. n. Spicules from the outer wall. The large opacpae spicule is 



similar to those found in C. hicksoni and C. annulata. 



46. Chironephthya hicksoni, sp. n. Spicule from the outer wall. 



47. Chironephthya annulata, sp. n. Spicules from the outer wall. These are mostly coloured deep 



red, in the terminal twigs some are yellow. 



Plate 6. 



Polyp-heads of the Siphonogorgiidse. 

 Fig. 48. Chironephthya variabilis (Hickson). Specimen A. 

 49. Chironephthya variabilis (Hickson). Specimen B. 



