334 PROCEEDINGS OF THE AMERICAN ACADEMY 



discretis erectis, ultimis virgatis; ramulis oppositis ternisve appressis 

 1 - 2-cellulosis ; articulis inferioribus diametro multoties ramulorum 

 5 - 10-plo longioribus ad genicula constrictis ; apicibus obtusis. 

 Simoda, Japan ; in rock-pools at low water. 



44 Cladophora Stimpsoni : coespitosa, capillaris ; fronde tenui- 

 membranacea flaccida lajte virente di - trichotoma, axillis majoribus 

 iistantibus patentibusque, ramis pluries fui'catis, ramulis ad ramos 

 minores superiores SEepius pectinato-secundis longiusculis ; articulis in- 

 ferioribus longissimis filiformi-cylindraceis ; ramulorum diametro 5-8- 

 plo longioribus ad genicula subconstrictis ; apicibus subacutis. 



Hakodadi Bay, Mr. Stimpson. 



45. Cladophora densa: dense cjespitosa, fastigiata; fronde basi 

 radicante erecta stipitata biunciali capillari rigidiuscula dicbotoma ; 

 ramis pluries furcatis erectis, superioribus alternis sparsisve, araulis 

 paucis ; articulis primariis longissimis, cieteris diametro 5 — 10-plo lon- 

 gioribus ad genicula constrictis ; apicibus obtusis. 



Hakodadi Bay, Japan ; on rocks at half-tide. 



46. Cladophora fastigiata: casspitosa, nigro-viridis, basi radi- 

 cans ; fills vix uncialibus setaceis rigidis strictis trichotomis pluries 

 divisis fastigiatis, ramis ramulisque omnibus oppositis erectis vel ap- 

 pressis ; articulis diametro 8 - 10-plo longioribus, apicibus obtusis. 



Loo Choo Islands. 



47. Cladophora oligoclada : ctespitosa, Itetevirens, mollissima, 

 lubrica ; fills elongatis (3 — 4-uncialibus) capillaribus parcissime vage 

 et distanter ramosis, ramis longissimis simpliciusculis, ramulis secundis 

 brevissimis unicellulosis ; articulis ramorum diametro 4 - 6-plo longi- 

 oribus materie viridissima repletis pellucido-marginatis. 



Loo Choo Islands. 



48. Cladophora uncinella: pusilla, uncialis, densissime cKspi- 

 tosa, tetevirens ; fills trichotome ramosissimis capillaribus rigidiusculis ; 

 ramis primariis secundariisque oppositis, penultimis ramulisque falcato- 

 secundis crispatis ; ramulis valde hamatis ; articulis primariis diametro 

 pluries ramulorum 4 - 5-plo longioribus ; geniculis contractis. 



Ousima, north of the proper Loo Choo Islands. 



49. Cladophora polaris : crespitosa, lietevirens, mollis, nitlda ; 

 fills capillaribus strictissimis decomposite ramosis ; ramis ramulisque 

 erectis (axillis angustissimis), superioribus clavato-incrassatis succu- 



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