120 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.59. 



Order ROSALES. 

 Family MIMOSACEAE. 



Genus INGA Willdenow. 



INGA SANCHEZENSIS, new species. 



Plate 21, fig. 11. 



Description. — Leaflets of fairly large size, ovate lanceolate and 

 markedly inequilateral in outline, widest below the middle with an 

 acuminate tip and an acute base. Margins entire. Texture sub- 

 coriaceous. Length about 9 cm. Maximum width about 3 cm. 

 Petiolule missing. Midrib thin. Secondaries thin, camptodrome, 

 of a considerably different aspect in the opposite halves of the lamina. 

 Tertiaries mostly obsolete. 



The present species is rather similar to Inga oligocaemca Berry ' 

 from the Culebra formation of Panama. Less than a score of fossil 

 species are known, the genus being sparingly represented in the 

 European Tertiary, although the modern species, which number over 

 200, are confined to the American Tropics. There are several 

 species in the Antilles, but the majority of the recent forms are 

 continental. Among modern forms that have come to my notice 

 Inga maritima Bentham of Brazil is much like the present fossil 

 species. 



Occurrence. — Locality No. 8684. Cut in clay near pier at Sanchez, 

 District of Samana. 



Holotype.—Csit. No. 35452, U.S.N.M. 



Genus PITHECOLOBIUM Martius. 



PITHECOLOBIUM SAMANENSIS, new species. 



Plate 21, fig. 2. 



Description. — Leaflets broadly ovate and inequilateral in general 

 outline, sessile, with a blunt apex and a broadly rounded base. 

 Margins entire. Texture subcoriaceous. Length about 3.2 cm. 

 Maximum width 1.8 cm. Midrib stout, curved. Secondaries thin, 

 about 9 pairs diverge from the midrib at wide angles and fairly 

 regular intervals, curve upward and are regularly camptodrome. 

 Tertiaries comprise marginal loops and percurrent nervilles between 

 the secondaries. 



This leguminous leaflet is closely allied to the few fossil species 

 that have been referred to this genus and to numerous existing 

 species, as for example, the leaflets of Pithecolobium unguis-cati 

 Linnaeus) Bentham, a tree widespread over the Antilles. More) 

 than 100 existing species are known. They occur in both Tropics 

 but perhaps three-fourths are American, many of them, such as the 

 widely planted rain tree (P. saman Bentham), being large trees. 



' Berry, E. W., U. S. Nat. Mus. Bull. 103, p. 32, pi. 16, fig. 2, 1919. 



