LIST OP THE WOOD-CUTS. ix 



39. Idyia somewhat older than Fig. 37 36 



40. Idyia still older . . . . • 36 



41. Young Bolina in stage resembling Pleurobrachia , . . , 37 



42. Young BoUna seen from the broad side 37 



43. Young Bolina seen from the narrow side 37 



44. Ctanea aroiioa 40 



45. Scyphistoma of Aurelia (Agassiz) 41 



46. Scyphistoma older than Kg. 45 (Agassiz) ... . . 41 



47. StrobUa of Aurelia (Agassiz) 41 



48. Ephyra of Aurelia (Agassiz) . . 42 



49. AuKELiA FLAViDULA seen in profile (Agassiz) .... 42 



50. Aurelia seen from above (Agassiz) 43 



51. Oampanella pachtdeema 44 



52. The same from below 44 



53. Traohystema digitale 45 



54. Halioltstus AtrRiauLA 46 



55. Lucernaria seen from the mouth side . . ... 47 



56. Young Lucernaria 48 



57. Hydrarium of Eucope diaphana 50 



58. Magnified portion of Pig. 57 50 



59. Part of marginal tentacles of Eucope 51 



60. Young Eucope 51 



61. Adult Eucope, profile 51 



62. Quarter-disk of Fig. 60 . . .51 



63. Quarter-disk of Eucope older than Fig. 62 52 



64. Quarter-disk of adult Eucope 52 



65. Oceania languida just escaped from the reproductive calycle . 53 



66. Same as Fig. 65 from below 53 



67. Young Oceania older than Pig. 65 54 



Diagram of succession of tentacles ... ... 54 



68. Adult Oceania ... 55 



69. Attitude assumed by Oceania 56 



70. Clttia bicophoea escaped from reproductive calycle ... 57 



71. Somewhat older than Fig. 70 57 



72. Magnified portion of Hydrarium of Clytia 57 



73. Adult Clytia 57 



74. Zygodactyla groenlandica 58 



75. The same seen in profile 59 



76. TlMA fORMOSA 61 



77. One of the lips of the mouth 61 



78. Head of Hydrarium.of Tima 62 



79. Melicerttjm oampanot-a from above (Agassiz) 63 



80. The same seen in profile 64 



81. Planula of Melicertum 65 



82. Cluster of planulaa 65 



