The Actiüiae of the Plate CoUectiou. 305 



Fig. 43. Transverse section througli the basilat muscle of P. clc- 

 matis. 



Fig. 44. Äntlieopsis ocellata (Lesson). 2:1. 



Fig. 45. Antheopsis ocellata (Lesson), another individual. 1:1. 



Fig. 46. Transverse section of a second cycle mesentery of Ä. 



ocellata. 



Plate 17. 



Fig. 47. Transverse section of the basilar muscles of ^4. ocellata. 



Fig. 48 — 50. Sagartia chilensis (Lesson). 1:1. 



Fig. 51. Transverse section of the sphincter of S. chilensis. 



Fig. 52. Transverse section of a first-cycle mesentery of S. chilensis. 



Fig. 5.3 — 55. Sagartia herpeiodes n. sp. 1:1. 



Fig. 56 — 57. Transverse sections of the sphincter of two individuals 

 of S. herpeiodes. 



Fig. 58. Transverae section of a directive mesentery attached to 

 one of the secondary stomatodaea of S. herpetodes. 



Fig. 59. Choriactis impatiens (Couthouy). 1:1. 



Fig. 60. Transverse section of the Upper part of the sphincter of 

 C. impatiens. 



Fig. 61. Transverse section of a first cycle mesentery of C. impati(Piis. 



Fig. 62. Choriactis crassa n. sp. 1:1. 



Fig. 63. Individual of C. crassa divided longitudinally. 



Fig. 64. Transverse section of the sphincter of C. crassa. 



Plate 18. 



Fig. 65. Trans verse section of a first cycle mesentery of C. crassa. 



Fig. 66. ? Mctridium parvidum n. sp. 3:1. 



Fig. 67. Transverse section of the sphincter of ? M. parvuhcm. 



Fig. 68. Transverse section of a first cycle mesentery of ?M. par- 

 vulum. 



Fig. 69. Äiptasia sp? 1:1. 



Fig. 70. Hormathia exlex n. sp. 1:1. 



Fig. 71. Transverse section of a first cycle mesentery of H. exlex. 



Fig. 72. Chitojianthus casta)ietis n. sj). 1:1. 



Fig. 73. Transverse section of the sphincter of C. castaneus. 



Fig. 74. Transverse section of a first cycle mesentery of C. castaneus, 



taken near the lower edge of the stomatodaeum. 



Fig. 75. Crihrina conica n. sp. 1:1. 



Fig. 76. Transverse section of the sphincter of C. conica. 



Fig. 77. Transverse section of the basilar muscles of C. conica. 



