144 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.54. 



been described. The genus is present in the early Tertiary of Chile * 

 and during the middle Eocene it extended northward as far as Texas,* 

 and was present in the Mediterranean region of Europe in the Oligo- 

 cene and Miocene. 



A pod of a species of Copaifera, possibly belonging to the same 

 species which furnished the leaflets upon which Copaijera potosiana 

 is based, are represented at Corocoro, Bolivia. 



Holotype.—Csit. No. 35137, U.S.N.M. 



COPAIFERA COROCORUNA, new species. 



Plate 16, fig. 18. 



Description. — Pod of small size, nearly orbicular in outline, greatly 

 compressed, pedunculate, obliquely cuspidate tipped, single seeded. 

 Length, about 1 cm. from the top of the recurved cuspidate tip to the 

 top of the peduncle. Horizontal diameter, about 8 mm. Peduncle 

 stout, about 4 mm. long. Seed lenticular, nearly orbicular, com- 

 pressed, about 4 mm. in diameter. Pod tardily, if at all, dehiscent; 

 its surface minutely wrinkled. 



The present species is somewhat smaller than the normal size of 

 the pods in the existing species which I have seen, and it is also smaller 

 than those of the described fossil species. It may represent the fruit 

 of the same tree as the leaflets from Potosi described as Copaijera 

 potosiana. 



Holotype.— Cat. No. 35141, U.S.N.M. 



Genus BAUHINIA Linnaeus. 



BAUHINIA POTOSIANA, new species. 



Plate 17, figs, 1, 2. 



Description. — Leaves small, bifoliate. Leaflets unsymmetrical ob- 

 larsceolate or obovate, 2.1 cm. in length by 5.5 mm. in maximum 

 width. Margins entire. Leaf -substance thin. The stout shghtly 

 upward curved midrib forms the distal margin of the leaflet, only 

 the outside part of the lamina being developed. The latter is full 

 and evenly rounded. The apex is unsymmetricaUy rounded and the 

 base is cuneate. The midrib ^ gives rise to three secondaries which 

 diverge at acute angles and are subparallel both with each other 

 and with the margin of the leaflet. The lowest is thin and parallel 

 with the margin, close to which it arches from tip to tip of out- 

 wardly directed tertiaries from the second secondary. The latter, 

 which is much stouter than the other two, traverses the median 

 portion of the lamina, parallel to and somewhat nearer to the margin 

 than to the midrib. It forks twice or thrice, sending off subordinate 

 veins at acute angles, which form elongated camptodrome loops. 



» Engelhardt, H., Abh. Senck. Naturf. Gesell., vol. 16, 1891, pt. 4, p. 681, pi. 5, fig. 8; pi. 7, fig. 4. 



* Berry, E. W., Torreya, vol. 15, 1915, pp. 41-44, flg. 5. 



° This is probably morphologically aa upper secondary, the true midrib being obsolete. 



