― 140 ― 



- stem ！:' -radually passes into the flat, narrow-linear, costate, simple or 

 forked, principal rachis of a 4-5 times repeatedly decompound pinnate 

 frond. Branches and all their divisions are midribed, alternate and 

 distichous, but the ramihcation is very unequal, long and short ra muli 

 often alternating without order. The branches are about 2 mm. in 

 breadth, and very o-raclually attenuate toward their bases. They are 

 closely serrated with alternate, delteo-subulate, erecto-patent teeth 

 which are somewhat Ioniser than the breadth of the rachis. The 

 teeth are much lonp^er and more incurved on the upper portion ot 

 branches, more especially so in youiio- branchlets, than those on the 

 lower portion. Cystocarps are seated on the micirib, just below the 

 €xtermities of ramuli. The terminal port'on of the ramulus bearino- 

 a cystocarp tends to the side opposite to its longitudinal axis. The 

 longitudinal axis of cystocarp does not coincide with the lower portion 

 of the midrib, but makes an anp*le of about 135"^ with it, while the 

 upper part of the midrib turning to the other side makes an ap" 

 proximately ricrht angle with the lono-itudinal axis of cystocarp. The 

 carpostome does not point upward, but obliquely to the midrib and 

 slightly above the plane of the ramulus. The inner wall of pericarp 

 surroundins:, the neucleus is made up of somewhat anastomosing', 

 filamentous rows ol cells, which convero-e toward the carpostome. 

 Neucleus is simple and spore-fiaments are fasciculated from a pretty 

 larp'e central cell (" Snelzelle ，，)， The cortical layer over the midrib 

 is thicker than that on the membranous portion of frond. 



Plant so closely allied to Delisea pitlchra Almt. that 1 tormely 

 referred it to that species in my " Alg. jap. Exsic. no. 19. It differs* 

 however, from that species by its thinner substance and the slenderer 

 midrib, in addition to the more important character of the position of 

 cystocarp. In D, pulchra、 as it is seen from the descriptions and 

 illustrations o-iven in Harvey's Phyc. Austr. pi. XVI, the cystocarp 



