branch and ramulus of the specimens which bear them. Tetraspores zoned, 

 dispersed through the peripheric cells; in more luxuriant individuals, with 

 more copious raniuli and tapering, acute apices. Colour a very dull reddish- 

 brown, or pale flesh-colour, becoming darker in drying. Substance coriace- 

 ous cartilaginous, tough but soft, bearing long immersion in fresh-water. 

 In drying the frond closely adheres to paper. 



This species, when not in fruit, can with diificnlty be known, 

 at least in the dried state, from slender specimens of M. mem- 

 branacea, but when bearing cystocarps it is readily separable 

 from that and from every other species by the terminal fruit. 

 The tetraspore-bearing individuals are scarcely different from 

 M. membranacea, and are probably often confounded with it. 

 Their cellular structure however is not the same. 



Fio-. 1. Mychodea teuminalis, the cystocarp-bearing individual, — the natural 

 size. 2. Apex of a fertile branch. 3. Transverse section through a cysto- 

 carp. 4. Transverse section of frond, with tetraspores imbedded in the 

 corticallayer. 5. Tetraspores: — n\\ mapi'ified. 



