OBSERVATIONS ON PEZIZA. 
139 
named, were united as one species, P. trechispora would still remain 
outside as an independent type. 
If we compare also with the series having rough sporidia those 
in which the sporidia are smooth, bat with the external features of 
the cups the same as in the rough spored series, we find the fol- 
lowing representatives 
scutellata, L. 
setosa, N. 
Kerguelensis, B. 
carneo-sanguinea, Fckl 
Sequoia?, Phil. 
umbrata, Fr. 
lentiformis, P . 
DIMENSIONS. 
5- 8 mm. 
■ 5 - „ 
. 12-18 „ 
2 - 5 
5- 
5 - 6 
i- 1 
HABITAT. LOCALITY. 
on wood # Europe, 
„ wood Europe. 
j ( N. Zealand 
” S roun jandKerguelen. 
„ ground Europe. 
„ twigs California. 
„ ground # Europe. 
„ ground Europe. 
Of the seven species only two are exotic ; the residue are 
European. One species is large, and analogous to P. miniata. 
One species is minute, and analogous to P. strigosa. The re- 
maining five species are of a medium size. The only one which 
exhibits any departure from the usual habitats is P. sequoice , which 
occurs on the dead foliage and twigs of Sequoia in California. 
Were it not for the sporidia being smooth, all of these, except P. 
umbrata , might be referred to rough spored types. The link which 
unites them is P. scutellata. The following are the measurements 
of the sporidia : — 
LENGTH. BREADTH. 
scutellata, L. 
•02- -022 
mm. 
•011--013 
mm. 
setosa, N. 
•02 
•01 
5 > 
Kerguelensis, .5. 
•023--025 
•017--02 
?> 
carneo-sanguinea, Fckl ... 
•02 
>> 
•01 
>> 
Sequoias, Phil. 
•017-02 
>> 
•012--013 
)> 
umbrata, Fr. 
•018 
•009 
}1 
lentiformis, P. 
•019 
•01 
>» 
Average 
•02 
?> 
•012 
The average size is very 
nearly the 
same 
as in the rough spored 
series. 
, The only important point which arises in respect to this group, 
and its relationship to the preceding one, is that of the rough or 
smooth epispore of the sporidia. It has generally been considered, 
and with some reason, that the character of the epispore is a 
tolerably safe guide. When we speak of permanence in relation 
to any organ, it must be always understood in a modified sense. 
There is no absolute permanence, and to characterise the rough- 
ness or smoothness of the epispore as a good permanent character, 
means only that it is comparatively permanent, or as much so as 
in the most stable of vegetable organs. For all practical purposes 
