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tially decorticated Lepidodendron that has ever come to my attén- 
tion, that I am obliged to regard Renault’s genus as valid. 
It seems not impossible, also, that the partially dacorticated mate- 
rial sent to Professor Zeiller may have included poorly preserved 
specimens of Lepidodendron Pedroanum, already known from sou- 
thern Brazil, or some other form of the genus not yet recognized 
by its surface criteria. There is, however, room for doubt as to 
Whether the surface described as the ‘“‘leaf cushion’ corresponds 
exactly lo the leaf cushion of the Lepidodendron or Sigillaria, 
This question can be answered only by ascertaining the cha- 
racter and mode of attachment of the leaves themselves. Lyco- 
podiopsis, of which Lycopodiopsis Derbyi is the generic type, is, 
I believe, one of the characteristic plants of the older Gondwana 
flora. Some fragment’s which are in part so similar to our species 
as to deserve the closest and most careful comparison have been 
described and illustrated by Seward (1) from Vereeniging, in the 
Transvaal, as Bothrodendon Leslii, From the examination of Seward's 
illustrations 1 am disposed to believe that his specimens, which he 
refers Bothrodendron only with doubt, are probably referable to 
the Brazilian genus. Professor Arber (2) very pertinently calls 
attention also lo a similarity between the Transvaal specimens and 
some fragment’s from India doubtfully referred hy Feistmantel (3) 
to Rhipidopsis. 
Attention should also be called to the broad axial fragment from 
the Petchora region of Siberia, placed by Schmalhausen (4) in Rhipido- 
psis ginkgoides, but which is perhaps congeneric with the Brazilian 
type. The original specimens of Lycopodiopsis Derby were reported 
by Doctor Derby (5) to have come from Piracicaba in the state of 
Sio Paulo, where they were associated with silicified fossil woods 
of conifers, Cordattvs, fragments of Psaronius, and with remains 
of the reptile, Stereosternum tumidum. A bed of earthy coal is 
said to lie near the horizon of these fossils. From these notes given by 
Renault I infer that the horizon of the specimens sent by Derby is pro- 
(1) Ann. S. Afr. Mus., vol. iv, pl. 1, 1903, p. 87, pl. xi, fie. 1. 4,5, 6, See also Arber. 
The Glossopteris Flora, p. 167, fig. 36. 
(2) Op. cit., p. 168. 
(3) Flora Gondwana Syst, v. HI pt. 2. p. 121, pl. xlviiA, figs. 5-7. 
(A) Beitr. z. Jura-Fl. d. Petschora-Landes, 1879, pl. vili, fig. 12. 
(5) See Renault, Bull. Soc, hist. nat. :-\utun, vol. ili, 1890. p, 109, note,- 
5560 49 
