5o STUDIES IN GEOLOGY, No. 4 



specimen which Neumann referred to this species and which 

 is probably nothing but a fragment of a stipe of Weichselia, 

 although this has not been definitely demonstrated to be the 

 case. 



The Neumann material was collected by Steinmann on 

 San Lorenzo Island among the profuse remains of Weich- 

 selia and has not been reported from any other Peruvian 

 locality. 



Equisetites sp. 

 PIRATE II Fig. 4 



A single specimen of a sheath of some species of Equi- 

 setales is contained in the small collection from Jatunhuasi, 

 Department of Junin. It is of considerable interest in show- 

 ing the undoubted presence of plants of this order in the 

 Mesozoic flora of Peru. 



Genus T^NIOPTKRIS Brongniart 

 Tceniopteris sp. 



Taniopteris sp., Salfeld, Gesell. Erdkunde Leipzig, Bd. 7, p. 213, 

 Pi. 3, fig- 3, 1911- 



This appears to be correctly referred to Tseniopteris al- 

 though it might represent the impression of the lower surface 

 of a Nilsonia frond. No Peruvian material, aside from this 

 fragment from Huallanco, Department Huanuco,, is known. 



Genus RUFFORDIA SEWARD 

 Ruffordia Gcepperti (Dunker) Seward 8 



Ruffordia Gccpperti Zeiller, Revue Gen. Bot., tome 25 bis, p. 7, pi. 

 20, fig. 2, 1914. 



Apparently correctly determined material from Pifionate 

 represent this widespread and wide ranging Lower Creta- 

 ceous type. 



s For discussion and synonymy see Berry, E. W., Maryland Geo- 

 logical Survey, Lower Cretaceous, p. 31, pi. 23, figs. 3, 4, 1911. 



