- 99 - 



* 



globular, depresso-umbilicate, perfused above. Tctrasfiores very small, 



forming ova! or insularly roundish, flat, wart-like nemathecia which arc 

 scattered over the upper surface of frond. Colour dark red, becoming 

 almost black in dtying. Substance coriaceo-membranaceous. tenaceous, be- 

 coming hard in drying and the frond does not adhere to paper. 



Of Tylottts, only one species, T. pbltisatits J. Ag., is hitherto-known, 

 of which Prof. Yendo remarks that there are two forms in Harvey's type 

 specimens (Notes on.AJg. new to Jap. Ill, Bot. Mag. Tokyo, Vol. XXIX, 

 no. 343, p. 110, 1915). " One is subdichotomously laciniated with the 

 breadth of segments nearly equal for the wii >le length," as is well known 

 in Phyc. Austr. PI. 210. " Other is irregularly laciniated at the base, 

 palmately lobed above with the segments broad arid imbricated with the 

 neighbouring ones. On the under-surface of the basal segments there are 

 many papillose rhizoidal processes. "Yendo I.e. With this, our specimens 

 :^cin to resemble in some measures, as Prof. Yendo remarks, but he does 

 not mention whether it is entirely erect or partly decumbent or wholly 

 repent. I do not know whether our plant is same with this second form 

 of Harvey or not, but the present plant seems decidedly to differ from 

 the first form on which T. ohlitsatus is established, by havinv, wholly 

 repenting habit and rhizoidal processes. Based on these grounds I take 

 the present plant as a new species. 



PI. CLXXIII, tig. 8-15: Fig. 8 : two different forms of cystocarpic 

 fronds of Tylutns Kchenoldes Okam. ; one is seen with rhizoidal processes. 

 T. Fig. 9 : portion of a nemathecium, 5 |. Fig. 10 : one of slit-like 

 spaces of the cystoc;irp with spores atlachad to the wall of the cavity, 

 ? -^. Fig. 11: portion of frond bearing nemathecia, f. -Fig. 12 : cortical 

 and subcorlical lavers of sterile portion of frond, --p. -Fig. 13: vertical 

 section of a cystoc.irp, -^- l . Fig. 14 : portion of a papilla-form elevation 





