330 PROCEEDINGS OF THE AMERICAN ACADEMY ' 



15. Odonthalia obtusangula : froncle plano-compressa in parte 

 superiori immerse costata lineari alterne decomposita, ramis distantibus 

 patentibus plus minus compositis juuioribus s^epe margine denticulatis, 

 ramulis alternis furcatis corymbosis erectis, laciniis ultimis anguste 

 subulatis ; axillis omnibus rotundatis apicibusque acutis. 



Straits of Sangar, Japan ; floating. 



16. Rytiphlcea complanata (Ag.) ; var. pusilla : fronde nana 

 complanata anguste lineari flabelliformi subfastigiata pinnatim decom- 

 posita, pinnis erecto-patentibus crebris pi. m. pinnatis, pinnulis subu- 

 latis alternis. — An. sp. distincta ? 



Hakodadi, Japan. 



17. Chondria crassicaulis : ironde crassissima succulenta vage 

 ramosa, ramis sparsis vel subverticillatis incrassatis flexuosis basi con- 

 strictis, ramulis sparsis fasciculatisve claviformibus obtusissimis basi 

 valde constrictis ; cystocarpiis ? — LaurencicB, sp. ? Harv. in Alg. Mor- 

 row, Japan Exped. 



Japan : Simoda, Dr. Morrow ; Hakodadi. 



18. PoLTSiPHONiA Stimpsoni: fronde capillai-i rigidiuscula vage 

 ramosa ; caule ramisque primarils corticatis arcuatis, ramis secundariis 

 horizontaliter patentibus divaricatisque subsecundis brevibus parum 

 ramulosis articulatis, ramulis subulatis patentibus, articulis diametro 

 aequalibus vel brevioribus 4-siplioniis, geniculis opacis ; ceramidiis ? 



Japan ; dredged in Hakodadi Bay by 3Ir. Stimpson, the zoologist of 

 the Expedition. 



19. PoLTSiPHONiA calacantha: fronde fuceseente capillari 4- 

 siphonia ecorticata vage ramosa, ramis sparsis flexuosis linearibus sira- 

 pliciusculisque per totam longitudinem ramulis brevissimis quadrifariis 

 horizontalibus divaricato-multifidis spinulosis confertissime onustis, ar- 

 ticulis brevissimis ; spinulis ramulorum apice fibrillifei'is. (Polysiph. 

 no. 13, Harv. Alg. Ceylon.) 



Loo Choo Islands, and Tanegasima, Japan, south of Kiu-siu. 



20. POLTSIPHONIA FLABELLULATA : pusilla, nigrcscens ; fronde 

 capillari flaccida brevi repetite dichotoma fastigiata, axillis acutis, apici- 

 bus vix attenuatis, articulis 6-siphoniis omnibus diametro brevioribus. 



Tanegasima, Japan. 



21. POLTSIPHONIA Harlandii : fronde 4-siphonia cortlcata tcssel- 

 lata setacea parum ramosa fuceseente, ramis virgatis simplicibus attenu- 



