144 



as broad, attenuated to both ends, and fertile in the median part. 

 Tetrasporangia prominently verrucose presenting two longitudinal 

 rows on the flatish sides and each sporangia is covered by two large 

 " Deckzellen " on the flank. Cystocarps are aggregated on the 

 apices of minute pinnulae, sessile on the inner side of each pinne.lla, 

 and appearing as if pedunculated at the base and calcarated at the 

 apex ; they are ovate with a wide mouth. Colour dark vinoso- 

 red, almost black in drying. Substance membranaceous and the 

 plant does not adhere to paper in drying. 



Hab. : Urupp Isl. 



PL. XCI. Fig. 1 : fertile frond of Oawithalia corymbifera 

 (Gmel.) J. Ag. ; rather smaller frond, -}. Fig. 2 : terminal portion 

 of frond, f. Fig. 3 : cross-section of the median portion of frond, . 



Fig. 4 : cross-section of the lower portion of frond ; a, the axis, ^. 



Fig. 5: apices of flabellate lacineae, " . Fig. 6: portion of the 

 tangential section of frond ; a, the axis, ~. Fig. 7 : marginal pinnae 

 bearing stichidia, -". Fig. 8 : portion of a stichidium viewed from 

 the flank showing covering cells, ". Fig. 9 : stichidium viewed from 

 the surface, ^. Fig. 10 : portion of marginal pinnae bearing cysto- 

 carps on pinnulae, -/. Fig. 11 : two cystocarps, 4 i 2 . 



Odonthalia Lyngbye 1819. 



c sr ft # ii' Ji- 



RHODOMKLKAE (RHODOMELACEAE). 

 & t>* i 1 feffif*. 



& = n *,mM* ^ 4 1 m ? & *, 



*, m mm- ?&r. 



U )\' ' ill * 'h & ? 33 ;l)c - .71 5: ^ ; K ft} jR 



