328 PROCEEDINGS OF THE AMERICAN ACADEMY 



3. Sargassum (Holophtlla) Ringgoldianum: caiile compresso 

 pinnatitn ramoso, ramis horizontalibus complanatis ancipitibus flexuosis 

 pinnatim compositis, pinnulis angulatis ; foliis lanceolatis integerrimis 

 verticalibus crassis basi attenuatis immerse costatis, junioribus sub- 

 enerviis ; vesiculis maguis oblongo-ellipsoideis ad basin ramulorum 

 solitariis folio coronatis ; receptaculis racemosis junioribus inermibus. 



East coast of Japan, and at Simoda. 



4. Sargassum (Holophtlla) Rodgersianum : (caule ignoto) 

 ramis ad ortum retrofractis ? compressis flexuosis pinnatim decompo- 

 sitis, ramulis decompositis ; foliis omnibus patentissimis angustissirae 

 linearibus immerse costatis subenerviis integerrimis ; vesiculis longe 

 petiolatis sphasricis longissime mucronatis vel folio filiformi 1-2- 

 unciali coronatis ; receptaculis linearibus inermibus obtusis demum 

 racemosis. 



East coast of Japan, floating at sea. 



5. Sargassum (Holophtlla) siliquastrum ? (Ag.), var. ptri- 

 FERUM : (caule ignoto) ramis ramulisque ad ortum retrofractis com- 

 presso-i^lanis ancipitibus decompositis, superioribus in ramulis angus- 

 tissimis desinentibus ; foliis inferioribus lanceolatis oblongisve distanter 

 serrulatis immerse costatis, superioribus angustissime linearibus inte- 

 gerrimis subenerviis ; vesiculis magnis ad basin ramulorum solitariis 

 pyriformibus longe mucronatis ; receptaculis linearibus inermibus deni- 

 que in ramulo racemosis. 



Simoda, Japan, on rocks at low tide. 



6. Sargassum (Holophtlla) cortnecarpum : caule triquetro, 

 ramis ad ortum retrofractis ; foliis radicalibus inferioribusque elliptico- 

 oblongis latis subintegerrimis vel repando-dentatis crassis immerse cos- 

 tatis, superioribus ramuliformibus angustissimis costatis paucis ; vesiculis 

 magnis ellipsoideis mucronatis ; receptaculis clavatis plano-compressis 

 inermibus emarginatis racemosis. 



Simoda, Japan. 



7. Sargassum (Carpophtlla) assimile: caule tereti lasvissimo ; 

 foliis e basi valde obliqua cuneata oblongis obtusis minute glandulosis 

 argute dentatis nervo infra apicem evanescente costatis ; vesiculis in 

 petiolo sursum compresso ipsis vix breviori splia3ricis muticis ; re- 

 ceptaculis foliiferis saspius furcatis, laciniis integerrimis vel remote 

 denticulatis. 



Loo Choo Islands, in tide-pools. 



