refers : its aim being to invite or incite other Liclienologists to 
make similar contributions, in order, in course of time, to the 
compilation of as full a list as is attainable. It represents 
only the information to which I have access in my own 
library. There are so many labourers in the Lichenological 
field in all parts of the Continent, and, indeed, now in all 
parts of the world — observers w r ho are constantly publishing 
their results in multitudinous forms that are unknown or in- 
accessible to me — that completeness in such a list as mine is 
unattainable. It refers exclusively to Lichens whose names 
or descriptions have been already recorded — for the most part 
by Continental authors. The micro-parasites met with by 
myself — many of which are, so far as I can ascertain, new r , 
and which require accompanying plates for the elucidation of 
their structure — are reserved for publication in another paper. 
The present list relates to the lower Lichens, most of them 
athalline. Some of the higher Lichens are also, however, 
occasionally parasitic on other species, e. g. I have met with 
various Parmelice or Physcice parasitic on other Parmelice or 
on Umbilicaria, in alpine or arctic countries. But there is 
no difficulty in their determination ; and a consideration of 
them does not, therefore, form part of the object of the pre- 
sent paper. Of an intermediate character between the para- 
sitic Parmelice in question and the parasitic Lecidece and 
other Lichens, presently to be enumerated, are the fol- 
lowing : 
1. Ephebe pubescens, Fr. — On the protothallus of Stereo- 
caulon tomentosum and S. condensation (Korb., Syst., 11 
and 14). 
E. byssoides (Carrington, Irish Crypt., p. 7) creeps over 
Hepaticce, e. g. Frullania tamarisci, v. microphylla. 
2. Normandina Jungermannice, Del. Mudd., 268. 
Syn. Lenormandia, Del. Hepp, 476; Nyl., exs. 89. 
Verrucaria pulchella, Borr. 
Endocarpon, Ilook. Leiglit. 
Coccocarpia, Bab. 
On various Hepaticce, especially species of Frullania, Radula, 
and Jungermannia, e. g. J. dilatata (Hepp, 476), F. tama- 
risci (Carrington, Irish Crypt., 7) ; on certain mosses, e. g. 
Hypnum cupressiforme (Nyl., Prod., 174); on various saxi- 
colous Scytonemata (Nyl.) ; as well as on several Lichens, 
e. g. Pannaria triptophylla and P. plumbea. 
The spores described by Leighton (Brit. Angioc. Lich., 
13, and Nylander, Prod., 173) probably belong to a para- 
sitic Fungus = Sphceria Borreri, Tul., 128 (Korb., Svst., 
101 ). 
