OF ARTS AND SCIENCES. 331 



atis, ramulis quoquoversum egredientibus brevibus basi simpliclbus 

 nudis apice pluries furcatis fastigiatis, apicibus acutis, articulis ramulo- 

 rum pellucidis diametro subbrevioribus ; tetrasporis sub apice ramulo- 

 rum solitariis. 

 Hong Kong. 



22. Wrangelia ? Tanegana : fronde corticata ; ramis quoquover- 

 sum egredientibus ramellis densissime vestitis, ramellis brevissimis ver- 

 ticillatis crassis bis terve furcatis mucronatis, articulis ramellorum 

 diametro gequalibus ad geuicula valde constrictis. 



Tan egasima, Japan. — Fruit unknown : perhaps a Callithamnion or 

 Halurus. 



23. Desmia Japonica: fronde latiuscula compresso-plana subfla- 

 belliformi decomposito-pinnata, pinnis irregulai'ibus lato-linearibus, pin- 

 nulis ina3qualibus subulatis, axillis omnibus rotundatis. 



Simoda, Japan ; on rocks at low tide. 



24. Gracilaeia gigas : fronde cartilagineo-carnosa crassissima 

 tereti siccitate collapsa elongata vage ramosa, ramis alternis secundisve 

 longissimis simpliciusculis nudis vel ramulis paucis filiformibus obsessis, 

 axillis rotundatis, apicibus attenuatis. 



Simoda, Japan ; on rocks at low tide. 



25. Gracilaria eucheumioides : fronde primaria decumbente 

 crassissima compressa vage et parce ramosa, ramis clava^formibus sim- 

 pliclbus vel apice furcatis compressis nudis vel hie illic tuberculis 

 onustis tunc erectiuscula pi. m. pinnatim ramosa, apicibus obtusis. 

 (Harv. Alg. Ins. Amic. no. 35.) 



Ousima, and the proper Loo Choo Islands. 



26. SuHRiA Japonica: fronde costa crassissima percursa lineari 

 (prolificationibus a costa et margine emissis) decomposite ramosa, 

 margine integerrimo ; sporophyllis ? sa3pius varie lobatis, apicibus ob- 

 tusissimis. 



Simoda, Japan. 



27. Caulacanthus compressus : fronde pusilla dichotomo-multi- 

 fida fastigiata, laciniis primariis sursum latioribus compressisque, stipite 

 ramulisque teretibus, axillis rotundatis, ramulis spinicformibus sparsis 

 patentibus simplicibus ramosisve. 



Loo Choo Islands ; in rock-pools. 



28. Galaxaura distenta : fronde tenui subcompressa continua 



