302 Algae. 



Eiicheuma spinosiim (L.) j. hg. 60. Ceratodictyon spongiosiim 

 Zanard. 61. Gracilaria confervoldes (L.) Grev. 62. Mypnea 

 seticiilosa j. Ag. 63. Hypnea saldana Holm. 64 Gastrocloniiim 

 ovale (Huds.) Kuetz. 65. Erythrocolon Muellerl (Sond.) J. Ag. 

 66. Nltophylhim unclnatiim (Turn.) J. Ag. 



67, Caloglossa Leprleiirii (Mont.) J. Ag. var. contimia 

 Okam. n. var. 



Fronds decumbent, irregularly dichotomous or often sub- 

 alternate, continuous (not constricted), slightly bending at apices 

 toward the under-surface. 



68. Caloglossa ogasawaraensis Okam. (syn. Cal. Zanzi- 

 bariensls Goeb.). 69. Acrocysiis nana Zanard. (placed by the 

 author near Chondrla from the study of the anatomical cha- 

 racters). 70. Polyslphonia fragllls Sur. 71. Pterosiphonia 

 pennata (Rostr.) Fkbg. 72. Symphyocladia marchantioldes 

 (Harv.) Fkbg. 73. Rhodomela Larix (Turn.) C. Ag. 74. Her- 

 posiphonla fissidentoides (Holm.) Okam. 75. Heteroslphonla 

 pulchra (Okam.) Fkbg. 76. Ptilota pectinata (Gunn.) Kjellm. 

 f. typica Kjellm. 77. Carpoblepharls Schmltzlana (Rbd.) Okam. 

 78. Ceramliini clavulatum Ag. 79. Microciadia corallinae (Mart.) 

 Okam. 80. Campylaephora Hypnaeoides ]. hg. 81. Gloiopeltes 

 cervicornis (Sur.) Schmitz. 82. Peyssonnelia caulifera Okam. 

 83. Corallina radlata Yendo. 84. Zonaria Dlesingiana j. Ag. 

 85. Scytosiphon lomentarius (Lyngb.) j. Ag. 86. Endarachne 

 Binghamiae j. Ag. 87. Cladosiphon decipiens (Suring.) Okam. 

 (Syn. Mesogloia decipiens Sur. Referred to this genus by the 

 author ou account of the character of the plurilocular sporangia.) 



88. Cylindrocarpiis rugosa Okam. sp. nov. 



Frond, crust like, at iirst circular, afterwards irregularly 

 expanded, ieather-like, chestnut coloured, thickish, lubricous, 

 diameter varying from a few to 10 cm. or more; crust adhering 

 to the substratum with its whole under-surface, soon forming 

 wrinkles on the upper surface which gradually develop to well 

 deiined folds. 



89. Leathesia difformis (L.) Aresch. 90. Mesogloia crassa 

 Sur. 91. Chordaria abielina Rupr. 92. Viva conglobata 

 Kjellm. 93. Chaetoniorpha crassa (Ag.) Kuetz. 



94. Chaetoniorpha spiralis Okam. sp. nov. 



Filaments very rigid, of a deep green color, attached to 

 the substratum when young, if they come in contact with other 

 algae they detach themselves from the Substrate and twine 

 around these foreign algae or around other filaments of the 

 same species. Lower articulations sub-cylindrical or more or 

 less constricted and ventricose, about 300 /< thick in the basal 

 cell, soon attaining 600 — 750 a in diameter above, with almost 

 isodiametric articulations, becoming gradually thicker upward 

 with compressed-globular or almost globular articulations which 

 attain 1,7 — 2 — 2,5 mm. in diameter and are shorter than 

 broad; surface of cells finely striated longitudinally and trans- 



