264 
Lichenes — Myxomycètes 
Nine additions to the flora of Southern California are here described, 
two of which Lecidia bullata and Mycoporellum Hassei are new to science. 
The latter is described by Zahlbruckner. J. Ramsbottom (London). 
HASSE, h. E., Additions to the Lichen flora of Southern Cali¬ 
fornia. No. 8 (Bryologist 1918, 16, 1—2). 
Four additions to the Southern Californian Lichenflora are here 
described. One species Dermatocarpon (Section Endopyrenium ) Zaht- 
bruckneri and one variety Maronea constans var sublecideina are diagnosed 
as new to science. The latter is described by Zahlbruckner. 
J. Ramsbottom (London). 
LISTER, GL, Presidential Address. The past students of Mycetozoa 
and their work (Trans. Brit. Mycol. Soc. 1913, 4, 44—61). 
In her Presidential Address, Miss Lister dealt in an attractive way 
with the gradual perception of the nature of the Mycetozoa and their 
classification adding interesting details of the lives of the most prominent 
workers. The first naturalists who observed Mycetozoa considered they 
were Fungi\ and regarded the latter as being impossible, if not un¬ 
worthy, of classification. Tournefort seems to have been the first 
to describe a myxomycete, and Marchant to have been the first to 
give a detailed de-scription of a species. The work of Micheli, with four 
genera that refer to Mycetozoa and Haller with the addition of two new 
genera is described and contrasted with that of Hill, Linnaeus, Batch, 
Bulliard, Schrader and Persoon are also specially dealt with. It is 
pointed out that the spiral markings of the elaters of Trichia were described 
and figured by Hedwig in 1802. Other prominent workers who are dealt 
with rather fully are Schumacher, Schweinitz, Fries, Berkeley, 
de Bary and Rostafinski “those in the past whose work has made 
landmarks in our knowledge of Mycetozoa , who accomplished faithful and 
beautiful work ... with very simple appliances, and with little assistance from 
those who had lived before to guide them”. J. Ramsbottom (London). 
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