AliGM. 259 



arise fascicles of minute simple or dichotom^ns, tnoniliform, arti- 

 culated threads ; the articulations elliptical, being themselves the 

 seeds or sporidia, separating in age and geminating. Ag. 



55. Lemania. Frond filiform, torulose or inflated at inter- 

 vals, coriaceous, cellular. Seeds or spomdes beaded, collected 

 into pencil-shaped tufts, and fixed to the inner surface of the 

 hollowed part of the frond. 



Div. II. CONFERVOIDE^. 1 



Plants filamentous, really or apparently articulated (destitute of 

 definite gelatine). 



Tribe XIV. Ectocarpe^:. Plants olieaceous or rirescent, 

 marine. Fructification moncecious; external capsules, and globules 

 in swollen ramuli. 



56. Cladostephus. Famuli whorled. 



57. Sphacelaria. Rigid, mostly pinnate, longitudinally 

 striated, the apices sphacelated. 



58. Ectocarpus. Capillary, flaccid, the apices attenuated, 

 acute. 



Tribe XV. Ceramie;e. Plants red or purple, rarely brown , 

 marine. Fructification double, dioecious ; — 1 . external cap- 

 sules ; — 2. polymorphous receptacles or granules in swollen 

 ramuli. 



59. Polysiphoxia. Longitudinally striated, with internal 

 parallel tubes. Fructification ; — 1. ovate capsules; — 2. granules 

 in swollen ramuli. 



60. Dasya. Stems inarticulate, cellulose, the ramuli articu- 

 lated. Fructification ; — 1. ovate capsules; — 2. lanceolate recep- 

 tacles, including granules in transverse fasciae. 



61. Ceramium. Filaments reticulated, dissepiments opaque. 

 Fructification; — I. roundish capsules with a membranaceous 

 pericarp; — 2. oblong granules in the upper ramuli. 



62. Spyridia. Main filaments inarticulate, cartilaginous, bet 

 set with articulated ramuli ; dissepiments opaque. Fructifica- 

 tion; — L trisporous capsules with hyaline pericarps clustered 



round the btset of the ramuli : — 2. pedunculated 'jelatinoi;- 



ceptacles \\ itli membranaceous periearps, often surrounded l»\ an 

 involucre of short ramuli, containing two or tine ■ masses of 

 roundish granules. 



83. (ini 1 1 1 1 ii-i \. Filament* mostly dichotomous, dissepi- 

 ments hyaline. Fructification; — 1. clustered capsules and 



» By W. II. II.hv.v. Baq. 



