— 521 — 
gularly branching at very open angle. They seem to agree so far 
with the small root fragments described by Feistmantel (1) and 
Zeiller (2) as Vertebraria indica that I provisionally refer them to 
the same genus. No fragments distinctly showing the rectangular 
-segmentation so characteristic of the flattened impressions of these 
rhizomes have yet been found. 
In view, therefore, of the difficulties altending the interpretation 
of small roots when preserved as impressions only, some doubt 
must remain as to the generic reference of the fragments in hand. 
As stated in my remarks on Gilossopteris, the genus Vertebra- 
ria is founded on rhizomes which have been independently proven 
by Zeiller (3)and Oldham (4) to have borne the leaves known as 
Glossopteris. 
Lacalities : Barro Branco coal, Nova Estrada near Minas, Santa 
Catharina. About 175 meters above the granite, or 105 meters 
below the the Iratv black shale. Lot 3589. Also Northeast of Mi- 
nas, Santa Catharina, 55 meters above the granite or 225 meters 
below the Iraty black shale. Lot 3921. S. Jeronymo coal near Can- 
diota, Rio Grande do Sul. About 20 meters above the Irapura coal. 
Lot 3924. 
Gangamopteris 
Mc Coy. Trns. R. Soc. Victoria. vol. V, 1861, p. 107. 
The genus Gangamopteris differs from Glossopteris chiefly 
by the absence of a distinct midrib and petiole. Its leaves, some- 
times of very great size, vary from orbicular-oval to narrow and 
linear. They are usually long-obovate in general form, and more 
or less narrowed towards the sometimes cordate, sometimes ra- 
ther narrow cuneate base. 
The basal and central portions are traversed by close, erect, and 
parallel veins, occasionally anastomosing, the sueécessive outer ones 
gradually bending outward and forking several times while anas- 
tomosing at acute angles. The mesh is generally shorter and narr~ 
(1) Fl. Gondwana Syst., vol. IV. p. 22, pl. VA, fig. 1. 
(2) Bull. Soc, Géol. Fr., (3) vol. XNIV, p. 351, pl. XV, figs. 2 e 8. 
(3) Loc. cit., p. 377. 
(4) Rec. Geol, Surv., India, vol. XXX, 4897, p. 45. 
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