OQ6 ZOOPHYTES. 



*30. A. fragilis (cellules sparingly decomp.) *32. A. magnifica. 

 *31. A. tenella. *33. A. filicosa. 



b. Cellules of the stars in a transverse section scarcely decompound or not at all so. 



I. Ridges sulcate or entire, lamellce unequally exsert. 



*34. A. versipora. *37. A. dcformis. 



*35. A. denticulata. *38. A. varia. 



*36. A. pectinata. 



II. Ridges narrow, entire, nearly naked at summit, lamellie unequal, but hardly at 

 all exsert, cellules of stars sometimes sparingly decompound. 



*39. A. rigida. 



III. Ridges entire or sulcate, lamella even; cells not coronate within, cellules of stars 

 not decompound or scarcely so. 



40. A. reticularis. *42. A purpurea. 



*41. A. pctrosa. *43. A. pulchra. 



IV. Ridges entire, lamellce even, cells coronate within; cellules of stars simple (cells 

 often very regularly polygonal). 



44. A. pentagona. 

 *45. A. favistella. 

 *46. A. eximia. 

 *47. A. sinuosa. 



48. A. melicerum. 



*53. A. abdita. 

 *54. A. tesscrifera. 



56. A. complanata. 



57. A. hcliopora. 



58. A. Hemprichii. 



*49. A. parvistella. 



*50. A. favulus. 



*51. A. cerium. 



*52. A. intersepta (hardly coronate). 



B. ERECT LOBED. 



*55. A. robusta. 



C. UNARRAKGED SPECIES. 



59. A. halicora. 

 *60. A. cyclastra. 

 61. A. favosa. 



SUBGENUS I. ORBICELLA. 



I. Caliculis prominentibus, cellis 2'" latioribus. 



1. A. ORBICELLA RADIATA. (Ellis.) 

 A. convexa. Corallum caliculis 1-1 V" remotis, cyttndricis, 5-6'" latis, 



