— 491 — 
the name which may temporarily result. It is highly appropriate that 
the name ofihe British engineer who for so long labored for the com- 
mercial development of the coalfields of Southern Brazil should thus be 
honored. 
Locality : Specimens without exact locality; Rio Grande do Sul. 
The types collected by Plant and described by Carruthers are now in 
the Department of Geology, British Museum of Natural History. 
DICTYOPTERIDE.Zz 
Glossopteris 
Brongniart, Prod. his. vég. foss. 1828, pag. 54. 
The name Glossopteris is applied to a group of leaf-like fronds, 
usually spatulate or lanceolate, but varying from round-oval to linear 
in form, acuminate toemarginate at the apex, and narrowly cuneate 
to cordate at the base which nearly always is petiolate. The leaf has 
astrong distinct median nerve which is in most species persistent 
quite or very nearly to the apex. The very numerous, arched, se- 
condary or lateral nerves originate more or less obliquely, and while 
forking one or more times in passing tothe border they anastomose 
to form areoles varying in form, size, and distribution, according to 
the species. 
The leaves probably grew singly, in pairs, or in bunches, from 
a large rhizome which is either alate, with occasional cross-junctions 
between the crests, in a manner comparable to that of Struthiopteris 
as described by Zeiller, or, as some other authors are inclined to 
believe, it is provided with an alate axis. This rhizome was described 
as Vertebraria by Royle in 1833, andthough it has been conclusively 
shown to belong to the fronds of Glossopteris, the name is still 
maintained for the reasons that it is not specifically so highly diffe- 
rentiated as are the leaves, and its representatives have as yet been 
found in union with but two species of Glossopteris, viz: Glossspteris 
Browniana and Glossopteris tndica. 
The rhizomes are also provided with small scales or scale-fronds 
obovate, cuneate, round and petiolate, or in other varying forms, 
with forking and anastomosing nervilles, but destituted of a midrib. 
(1) Bull. Soc. géol, Fr., (3) vol XXIV, p. 351 
