36 
Mycologia 
brown stalks, and measure i .3 to i .8 mm. in diameter. The thick, 
somewhat cartilaginous wall is densely charged with lime, and 
splits open in an irregular manner. 
Physarum straminipes List. Punta Arenas, Chile, February, 
1906. 
Physarum didermoides (Ach.) Rost. Buenos Aires, Argen- 
tina, April, 1906. 
Physarum nutans (Bull.) Pers. Corral, Chile, November 
and December, 1905. 
Physarum lateritium (Berk. & Rav.) Morg. Corral, Chile, 
December, 1905. This specimen shows dark, orange-red lime- 
knots, instead of the yellow knots with red centers usually seen 
in this species. But the character of both capillitium and spores 
is that of P. lateritium rather than of P. rubiginosum, to which 
otherwise the specimen shows a very close resemblance. It is 
very doubtful whether these two forms can be regarded as dis- 
tinct species. 
Fuligo septica (Linn.) Gmel. Corral, Chile, December, 1905. 
Punta Arenas, Chile, February, 1906. 
Physarella oblonga (Berk. & Curt.) Morg. Palermo Park, 
Buenos Aires, Argentina, March, 1906. 
Leocarpus fragilis (Dicks.) Rost. Punta Arenas, Chile, 
February, 1906. 
Diderma hemisphericum (Bull.) Horn. Buenos Aires, Ar- 
gentina, April, 1906. 
Diderma spumarioides Fr. Punta Arenas, Chile, February, 
1906. 
Diderma niveum (Rost.) Macbr., subsp. Lyallii (Mass.). 
List. Punta Arenas, Chile, February and March, 1906. These 
gatherings are scanty and in rather poor condition, but the mate- 
rial is sufficient to warrant its reference as above. In both cases 
the whitish, densely calcareous sporangia are provided with stout, 
concolorous stalks, and show whitish, more or less clavate colu- 
mellae. 
Diderma testaceum (Schrad.) Pers.? Punta Arenas, Chile, 
March, 1906. A single gathering, consisting of a few crowded, 
pulvinate sporangia, none of which are mature, is doubtfully re- 
ferred to this species. 
