130 STUDIES IN GEOLOGY, No. 4 



narrowing about equally distad and proximad. Apex broadly 

 cuneate pointed. Base slightly more extended than the apex, 

 about equally cuneate pointed or slightly narrower. Texture 

 subcoriaceous. Length about 10 cm. Maximum width about 

 4.4 cm. Petiole short and stout, about 5 mm. in length. 

 Midrib stout, curved, prominent on the lower surface of the 

 leaf. Secondaries fairly stout; the basal pair diverge from 

 the midrib at considerable but unequal distances above the 

 base and are hence not opposite ; their angle of divergence is 

 less than is the case with the balance of the secondaries and 

 a wide interval separates them from the secondaries next 

 above; they pursue regularly curved ascending courses sub- 

 parallel with the lower lateral margins and are eventually 

 camptodrome above the middle of the leaf. A very slight 

 enlargement and development of these would make the leaf 

 have distinctly tripalmate venation. The remaining secon- 

 daries, numbering 4 or 5 alternate pairs are generally con- 

 fined to the upper half of the leaf; they diverge at wider 

 angles and are shorter and more curved and likewise campto- 

 drome. The tertiaries are well marked, forming marginal 

 arches without, and mostly transversely percurrent nervilles 

 within, the secondaries. 



This new species is named in honor of Herman Engel- 

 hardt, the pioneer student of South American Tertiary floras. 

 It is not common in my limited collections but this is without 

 significance. It is clearly distinct from the two specie3 of 

 Goeppertia already described from these beds by Engelhardt. 

 The genus comprises about 50 species in the existing flora 

 and is confined to the tropical and subtropical regions of 

 South America where there is an abundant rainfall. The 

 genus is sometimes, as by Pax, made a section of the South 

 American genus Aydendron Nees, and the two are doubt- 

 fully distinct. They are also closely allied to Cryptocarya 

 R. Brown whose range includes southern Asia, Africa and 

 Australia, with about one-fourth of the existing two score 

 species South American. 



