50 Cyclosporiiuie, Sai-gassaeeae, Sarf^assiim. 



diiplici serie notata, iiuu-gine subspinesceiite-dentata. dentibus al- 

 terne sursum deorsuiuque spectantibus niarginem duplicautibus. 

 Vesiculs) in petiolo 8-9 mm. longo sursum incrassato sph;erico-el- 

 lipsoidea;, margine angustissimo integerrimo cinctaj et apiculo trun- 

 cato terminatcTe. Receptacula glomerulum crassum axillarem, folio 

 triplo breviorem formantia, furcato-ramosissima, teretiuscula sed 

 verrucis prominentibus densissimis spinosa. Substantia plantt^ exsic- 

 cat;c coriace;i. m;idefact;i! subcai-nosa. 



7(i. Sargassum obovatutn H;irv. Telf n. 3. Kuetz. Sii. p. (il8, J. Ag. 7^ 

 Sp. I, p. 346, Sp. Sarg. Austr;xl. p. 89. — K;ichidil)us r;unorum deor- 

 sum ob exsiccationem collabascenti-planis, sursum filiformibus, 

 ;dterne ramosis, ramis patentibus, foliis densis oblongo-obovatis 

 subpetiolatis seminerviis serratis; vesiculis sparsis, ellipticis vel 

 piriforniibus. in petiolo clavato-vesicato elongato, vix apiculatis ; re- 

 ceptaculis angulatis, spinulosis. ;ixillaribus, laxe c;espitosis, ramosis- 

 simis. 



Hab. ;id insulaiu Mauritii (Harvey, Melvill). — Folia inferiora 

 obovata, superiora nunc magis prolongata fere obovato-linearia, 

 costa evanescente et cryptostomatibus admoduin prominulis insi- 

 gnia, latiora conspicuo serrato-dentata, angustiora integriuscuhi. 

 Receptacula longiora laxiusque disposita quam in Sargasso cras- 

 si/blio .T. Ag. 



77. Sargassum duplicatum.I. .\g. Sp. Sarg. Austnil. p. 90, Sargassuin n 

 ilirifdlimii var. dwplicatain J. Ag. Sp. I, ji. 318, Sargassuin cri- 

 sl(r/(ilii(/n Harv. in Hook. Lond. Journ. Bot. I, p. 147, Sargassum 

 Pfeiffercv Grun. Alg. Fidsch. p. 5, vix Sargassum duplicatum 

 Bory Coquille n. 27. — Rachidibus ramoruin teretiusculis (exsicca- 

 tione coIl;ib;iscendo ;idparenter compressis); foliis subspathulato- 

 obovatis at inferiori parte adscendente. superiori subrecurva fere 

 subfiilcata, a supreina parte ligulam transversalem a pagina supe- 

 riore emittentibus, margiue grosse dentatis, seminerviis, cryptosto- 

 matibus sparsis fere hemisph:erice prominulis conspicuis instructis; 

 vesiculis paucis, in petiolo brevi dihxtato ipsarum longitudinem vix 

 i^quante, obovato-sph;pricis ; recept;iculis ramosissiiuis glomerulatis- 

 que, spinulosis. 



Hah. iu oceano Iiidico et P;icifico inferiore ;ul MoIucc;is et 

 Mascarenas. — Folia ;id basim vix excisa. Vesicuhe magnitudinein 

 seminis Pis-i sub;equ;intes. 



78. Sargassum berberifolium J. .\g. Sp. 1. p. 337, Sp. Sarg. Anstml. 

 p. 9(1, t. XXVI, \'. Kuetz. Sp, p. (iis. Sargassum crista'folium var. 



