SUBORDER ALCYONARIA. 655 



*47. G. humilis. 51. G. juncea. 



*48. G. furcata. *52. G. suffruticosa. 



49. G. flavida. 53. G. ramulosa. 



50. G. elongata. *54. G. spicifera. 



B. Subflabellate or not at all so ; polyps few and at distant intervals on the branches, 

 subalternate. 



*55. G. trichostemma. 56. G. exserta. 



C. Cortex (including verrucfs) thick half a line or more. 



I. Surface smooth or short verrucose. (Plexaurce.) 



*57. G. antipathes. *61. G. quincuncialis. 



*58. G. homomalla. *62. G. dichotoma. 



*59. G. anguiculus. *63. G. vermiculata. 



60. G. olivacea. *64. G. crassa. 



II. Verruca prominent. (Eunicaa^) 



*65. G. papillosa. 69. G. plantaginea. 



66. G. clavaria. 70. G. lima. 



*67. G. pseudo-antipathes. 71. G. mammosa. 

 *68. G. madrepora. 



D. Unarrangcd species. 



72. G. purpurea. 76. G. coccinea. 



73. G. Richardii. 77. G. rhizomorpha. 



74. G. penna. 78. G. alba. 



75. G. moniliformis. 



A. Cortex thin, not exceeding half a line in thickness, polyps crowded. 



I. Throughout reticulate, with no free branchkls. 



22. GORGONIA FLABELLUM. Large, yellow or red ; flabellate, and 

 throughout finely reticulate; spaces one to two and a half lines in 

 area, branchlets flattened, three-fourths to one and a half lines wide, 

 sometimes very prominently winged ; verrucse obsolete, except about 

 the margin of the frond, where they are often distinct but minute. 



West Indies. 



This common species grows to a large size; the fronds are some- 

 times two feet high and nearly as broad. The size of the spaces and 

 flattened branchlets, and the absence of verrucaB, except upon the ex- 

 treme branchlets, distinguish this species from those allied. Flat 

 or rounded processes sometimes grow from the branchlets at right 

 angles with the frond, which at times stand out one-fourth of an inch. 

 The branchlets are generally much compressed, and the spaces are 

 sometimes very small. The colour varies from an ash to a bright 

 yellow, and is occasionally red. The polyps are every where scat- 



