37 



shorter above, with short similarly arranged ramuli. The entire 

 ramification is thus a panicle. Hamuli very patent, armed with a 

 subulate, 2-4 celled, colored spines at each node longitudinally seriated 

 along the external side; the lower ones often slightly recurved, some 

 forcipated at apex, others simple and straight; the upper ones often 

 unequally forcipated and a little incurved at extremity, becoming very 

 patent afterwards. Tetraspores typically verticillate around the node 

 of ramuli in a single row, prominent, bulging out from and bracteated 

 by cortical cells, and enclosed in a hyaline membrane, roundish, trian- 

 gularly or somewhat cruciately divided. They are often seriated in a 

 longitudinal row, here along the external, there along the internal 

 side or along both the sides at the same time. Articulations little 

 shorter as the diameter in the basal portion of frond, i J-2J times long 

 in the median portion, becoming shorter above. Node corticated and 

 subequal, not being prominent, leaving interstices hyaline. Color light 

 pinkish-red ; substance soft and flaccid, and the plant adheres closely 

 to paper in drying, 



Remarks. The present plant may, according to J. Agardh's 

 Epicrisis, be referred to the section GiUaia and be placed in the 

 vicinity of Ceramium unoinatum Harv., G. AcantJionotum Carm., G. 

 ciliatum Ellis and G. flabelligerum J. Ag., with none of which it 

 shows any relations. The former three have regularly dichotomo-fasti- 

 giate fronds ; of those three species, again, the first has spines along 

 both external and internal sides, the third all around the node, the 

 second only along the external side with the inferior articulations 3-4 

 times longer as the diameter. With 0. flabelligerum J. Ag. the 

 present plant presents no affinity, not being corticated and setaceous. 



Among the species which have a single longitudinal row of tetras- 

 pores along the external side are G. ecliinotum J. Ag. and G. puberulum 

 Sond. The former has regulaly dichotomo-fastigiate frond with scattered 

 hyaline inarticulate spines and the latter has setaceous frond corticated 

 below. 



Among the species of Geramium of this country, the present plant 

 is the only one species, as far as known to this day, which belongs to 

 the section Giliata. 



