Berry: A MIDDLE EOCENE GONIOPTERIS 330 
appearance, but differs in venation. The American material of 
this last species is rather poor and I doubt very much its identity 
with the European type. A very widespread Tertiary type of fern 
liable to be confused with the Goniopteris is Osmunda lignitum 
Stur* in which, however, the tertiaries are all always simple, neither 
anastomosing nor forming interlateral rays. 
THE JoHNS HOPKINS UNIVERSITY 
Explanation of plate 22 
GONIOPTERIS CLAIBORNIANA Berry 
From the Eocene of Columbia, Lamiase. 
Fic. 1. Portion of a pinna, natura 
Fic. 2. Fragment of a frond, aint size. ® 
Fic. 3. Normal type of venation, X 4. 
Fic. 4. Unusual type of venation, X 4. 
* Stur, Jahrb. k. k. Geol. Reichs. 20:9. pl. 2. 1870. 
