— 483 — 
specimen brought to Paris by Martius. This is important, as it jus- 
tifies the expectation that Pecopteris also was present in the same 
region. 
In any event Psaronius was present in Sado Paulo where it 
is associated with Lycopodiopsis Derbyi, wood of Cordaites and 
conifers, and bones of Stereosternum, as reported by Renault (1) 
and by Zeiller on the authority of Doctor Derby. The genus is 
belived to be present in Parana also. 
It therefore seems not improhable that Pecopteroid representa- 
tives of the Northern Permo-Carboniferous fiora may be found as 
far south as the coal basins of the states of Santa Catharina and 
Rio Grande do Sul. It must, however be borne in mind that the 
fossil woods and vertebrate remains, with which the Psaronius is 
said to be associated, appear to belong to beds perhaps near the 
horizon of the Iraty black shale. We may expect, that therefore, 
Pecopteris fronds possibly bolonging to the Cladophleboid group of 
Permian forms, will be found in beds higher than most of the 
coals, and consequently of later date than the older Gondwana 
plants which occur so abundantly in the lower coal measures of Santa 
Catharina and Rio Grande do Sul. Farther north perhaps as far south 
as the states of Piauhy and Bahia, the northern types may possibly 
have thriven contemporaneously with the Gangamopteris and Glos- 
sopteris of southern Brazil. 
Locality : Between Oeiras and San Goncalo state of Piauhy (?) 
The type figured by Unger is said to be in the Museum d’Histoire 
Naturelle at Paris. 
PTERIDOSPERMS 
For reasons which willbe explained more fully in the discus- 
sions of the individual genera 1] have transferred to the Pteridosperms 
the genera Neuropteridium, Glossopteris and Gangamopteris, pre- 
viously included with the ferns. The close affinities between the 
sterile fronds of the two genera last named and those of the Cyclo- 
pteroid (including Whe Neuropteroid) and ‘Tacniopleroid Cycadfilices, 
and the Cyeadalean characters of the sporangiferous organs found 
{1) Bull. Soc. hist. nat., \utun, vol. HI, 1890, p. 102. 
