GEOLOGY AND PALEONTOLOGY OF THE CANAL ZONE. 37 



rounded full lower lateral margins and a very wide, somewhat ob- 

 liquely truncated base. Length about 12 cm. Maximum width, in the 

 lower half of the leaf, about 10 cm. Margins entire, full, and rounded. 

 Texture thin but coriaceous. Midrib stout, curved, prominent on the 

 lower surface of the leaf. Secondaries stout, 10 or 11 irregularly 

 spaced pairs, prominent on the lower surface of the leaf ; they diverge 

 from the midrib at wide angles which become more acute in the apical 

 part of the leaf, those on the narrower side are more ascending and 

 somewhat straighter than those on the wide side, all are conspicu- 

 ously camptodrome at some distance from the margin. Tertiaries 

 thin, mostly percurrent. Areolation of small, isodiametric polygonal 

 meshes, well marked on the under side of the leaf. 



This large leaf is unfortunately represented by fragmentary mate- 

 rial from a single locality in the Caimito formation. In some 

 respects its characters suggest a broad Ficus> but it seems clearly 

 identical with the species described by Engelhardt 1 in 1895 from 

 the Tertiary of Ecuador. I have, however, queried the determina- 

 tion because of the broken character of the Panama material. In 

 the illustration I have reconstructed a leaf from a combination of 

 the Panama material with the more complete specimens figured 

 by Engelhardt from Ecuador. The two largest fragments from 

 Panama are indicated on the drawing by tinting. It is unfortunate 

 for purposes of correlation that the present determination can not be 

 conclusive, although in view of other similarities shown between 

 the Oligocene plants of Panama and those from the Tertiary of 

 Ecuador, I am disposed to regard the present determination as 

 fairly satisfactory. 



The genus Hieronymia comprises about a dozen existing species 

 of shrubs and trees confined to tropical America and rather widely 

 distributed from Mexico to Brazil as well as in the West Indies. 



Occurrence. — Caimito formation, 7 miles northeast of Bejuca 

 (U.S.G.S. station No. 6840). (Collected by D. F. MacDonald.) 



Collection. — U. S. National Museum, Cat. No. 35314. 



Order SAPINDALES. 



Family SAPINDACEAE. 

 Genus SCHMIDELIA Linnaeus. 



SCHMIDELIA BEJUCENSIS, new species. 



Plate 17, fig. 4. 

 Description. — Leaf or leaflet elongate elliptic in outline, inequi- 

 lateral. Apex and tip equally and bluntly pointed inequilateral. 

 Margins entire. Texture coriaceous. Length about 11 cm. Maxi- 



1 tiber neue Tertiarpflanzen Siid-Amerikas, vol. 19, p. 11, 1895. 



