Dr. F. Kurtz— The Fossil Plants of Argentina. 447 



Bodenbender collected the following fossil plants (besides some 

 doubtful ones) : — 



Neuropteridium validum, Fstm. (abundant). 



Glossopteris communis, Fstm., or an allied form (the first Glossopteris 



in America ; rather common). 



■ retifera, Fstm. ! (rare). 



PhyUotlieca, sp. (common). 



Lepidodendron Pedroanum (Carruthers), Szajnocba. 1 



Stembergii, Brong. (togetber with Noggerathiopsis 



Hislopi, Fstm.). 

 Cyclopitys dichotoma, Fstm. 



Near Carizal, in the Sierra Famatina, province of La Rioja, 

 Bodenbender met with a splendid fern — Splienopteris, sp. nov. [ex 

 off. S. flexibilis, Heer) — and Phyllotheca, sp. 



Furthermore, at Trapiche, near Guandacol, in the same province, 

 he detected a beautiful Lepidodendron (stem and leaves, but the leaf- 

 scars unfortunately not well preserved), which I take to be Lepido- 

 phloios laricinus, Sternb. (also found in Rio Grande do Sul with 

 Gangamopteris cyclopteroides, Fstm., yar. attenuata, Fstm.), together 

 with Neuropteridium validum, Fstm., the Lepidophloios occurring in 

 strata overlying that containing Neuropteridium. 



My friend Dr. Bodenbender regards all these deposits of Bajo 

 de Velis, Pampa de Anzalan (= Sierra de Los Llanos), Sierra de 

 La Bioja (Vilgo, Amanao, Saladillas), Carizal, and Trapiche, 2 as 

 belonging to the same horizon, which he calls Permo-Carbon- 

 iferous, only making a stratigraphical difference between Carizal 

 with Trapiche on one side and all the other localities on the other 

 side. This is a geological question with which I have not to deal, 

 but, speaking in a purely botanical sense, I should discern at 

 least two local horizons, the first represented by the Bajo de Velis 

 alone, the other by the rest. The differences and similarities of 

 these two groups are as follows : — 



1. Common to both are Neuropteridium validum (very scarce in the 

 Bajo de Velis, abundant in the Sierra de Los Llanos, scarce at 

 Trapiche) and Noggerathiopsis Hislopi (abundant in the Bajo de 

 Velis, very common in the Sierra de Los Llanos). 



2. At the Bajo de Velis alone were found : Gangamopteris cyclo- 

 pteroides (not very frequently), Eqidsetifes Morenianus (not very 

 frequently), EuryphyUum Whitiyanum, Fstm. (one leaf, which I 

 described as a variety of Noggerathiopsis, but which Zeiller, I.e., 

 thinks may be EuryphyUum), and the two Rhipidopsis. On the other 

 hand, we know only from the Sierra de Los Llanos, etc., the two 

 species of Glossopteris, the Phyllothecas (abundant), the Lepidoden- 

 drons, and the Cyclopitys. There remain the Splienopteris and the 



1 The plant from Retavisto, in the province of San Juan, which Szajnocha 

 (Sitzungsber. Ak. Wiss. Wien, Bd. C, Abth. i, p. 5) considered to be this species, 

 belongs rather to a type of the Culm, perhaps to L. Volkmanni, Sternb. (R. 

 Zeiller, Bull. Soc Geol. France, J. xxiii, 1895, p. 608.) 



'- He is rather inclined even to include Betavisto, which I take to be Lower Car- 

 boniferous (Culm]. 



