78 
Mycologia 
Texas and is entirely unlike any previously recorded fossil forms. 
I do not know its botanical affinity and rather than multiply gen- 
eric terms of unknown botanical value I have preferred to refer 
this and the preceding species to Felix’s genus Cladosporites, being 
influenced in the case of the present species by its resemblance to 
the existing Cladosporium herbarnni (Pers.) Link. It may be 
incompletely described as follows : Mycelium intra-cellular, in the 
vessels of the secondary wood, attached to the vessel walls by 
haustoria, and forming small fasciculate apparently unbranched 
tufts projecting freely in the vessel cavity. The hyphae are thin 
and the majority are somewhat tapering distad although in some 
cases they taper proximad. Septa were not observed. In only 
one case was a distal branch observed (PL 182, f. i.) Although 
there are some hundreds of tufts of this fungus in the slides 
examined, only two of these show conidia (PI. 182, f. 2). The 
latter are terminal, fusiform in outline and somewhat variable in 
length. They appear to be simple and I am unable to assert 
positively that they are cut off from the hyphae by septa although 
I imagined that I saw such septation. The hyphae average about 
.0013 mm. in diameter and the conidia range from .002 mm. X 
.004 mm. to .002 mm. X -Oi2 mm. in diameter. 
Associated with this species are rambling mycelial hyphae which 
clamber over the vessel walls. These bear numerous antheridia 
and odgonia or sclerotia and their characteristic appearance is 
shown in PI. 182, f. 2. I do not consider it worth while to attempt 
to name or describe them. 
The three species that I have ventured to describe are so unique 
and well preserved as well as so characteristic that I hope their 
publication may incite some experienced mycologist to delve in 
the field of fossil fungi which should prove to be a scientifically 
fruitful as well as delightful occupation. 
It has been abundantly proven that we knew but little of the 
phylogeny of the vascular plants before their extinct ancestors 
were considered and the same should prove true in the case of the 
lower plants which are of so much more ancient a lineage. 
The Johns Hopkins University, 
Baltimore, Maryland. 
