Jennings — Two New Species of Phyeopeltis, New Zealand. 761 



Species of Phtcopeltis. 



(a) Colour : black. 



(b) Colour: yellow, orange, 

 or red brown. 



r r 



I- I 



(1) p. nigra, Jennings. 



(«) Hsematochrome red-brown. 



Thallus lobed ; disc-sporangia elon- 

 gate-oval, terminal ; sporangia on 

 pedicels of 2-6 cells. 



(2) P. Treuhii, Karsten. 

 Thallus discoid ; sporangia terminal 

 on cell-rows of the disc, without 

 pedicel. 



(3) P. maritima, Kaesten. 



[h) Hsemotochrome, yellow. 



Thallus radially lobed; disc-sporangia 

 terminal, elongated ; sporangia on 

 long slender sinuous unicellular 

 pedicels. 



(4) P. aurea, Karsten. 

 Thallus discoid, then spreading, 

 margin entire, never lobed ; disc- 

 sporangia intercalary, barrel-shaped : 

 sporangia on a short, wide, uncinate 

 pedicel, carried on a basal cell. 



(5) P. expansa, Jennings. 

 SmaE circular discs on leaves in 

 Central Europe. 



(6) P. epiphyton, Mill. 

 Small circular discs on reeds in 

 Algeria. 



(7) P. arundinacea, Kxjtzing. 

 Thallus forming radial flabellate 

 lobes, sometimes with baiTcn hairs. 



(8) P. tropica, Mob. 



= P. flahelligera, De Toni. 



There remains still to be considered the relation of these algal 

 forms to associated fungus hyphse. 



In the historical summary given above, attention has been called 

 to the alga only, but in most cases the observers there mentioned 

 found their studies complicated by the presence of fungus hyphte or of 

 completely developed lichens. 



Thus Cunningham found that the discs of Mycoidea passed into the 

 condition of a lichen with lecideine apothecia and Marshall Ward 

 showed that the same or a similar alga formed the gonidial element of 

 the lichen Strigula oomplanata, Fee. 



Bornet also observed that a yellow plate-like alga growing on 

 leaves in Brazil passed into the Uchen Opegrapliafilicina.^ 



More recently it has been pointed out by Hariot that the 



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