LIST OF ILLUSTRATIONS xv 



FIG. 1'AGE 



26. Stictyosiphon Decaisneii, section 103 



27. HydroclatJirus, sporangia and cryptostomata 106 



28. Sphacelaria, sporangia, &c 112 



29. Ectocarpus confervoides 118 



30. Caulerpa phyllaphlaston 122 



31. Caiderpa cactoides 123 



32. Caiderpa ligidata and G. Holmesiana 125 



33. Caiderpa Carruthersii 126 



34. Vaucheria synandra 129 



35. Codium tomentosum, sporangium 132 



36. Bryopsis Flanagani 134 



37. Avrainvillea, structure 138 



38. Penicilhis capitatus 140 



39. Rhif)ocephalus Phoenix 141 



40. Udotea Pavonia 142 



41. Halimeda monilis 143 



42. Acicularia Schenckii 145 



43. Acetabidaria and Acicularia, structure 146 



44. Acetabidaria crenulata 149 



45. Neomeris and Bornetella 153 



46. Valonia and Halicystis 158 



47. Dictyosphceria, structure 160 



48. Strnvea macrophylla, S. plumosa, and S. tennis .... 162 



49. Boodlea coacta 164 



50. Gomontia polyrhiza 167 



51. Urospora penicilliformis .-.. 168 



52. Chcetomorpha Darwini 169 



53. Botttocoleon piliferum ....171 



54. Letterstedtia insignis 175 



55. Halosphwra viridis 178 



56. Ceratium Tripos 183 



57. Pyrocystis noctiluca and P. fasiformis 184 



58. Rhabdosphere and Coccosphere 186 



59. Pinnularia viridis, and diagram of successive divisions 



of a Diatom 193 



