162 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 54. 



INCERTAE SEDIS. 



CARPOLITHUS ENGELHARDTI, new name. 



Plate 18, fig. 17. 



CarpoUtes ovoideus Engelhardt, Sitz, Naturw. Gesell. Isis in Dresden, 1894, 

 Abb. 1, p. 13, pi. 1, fig. 58 (not Corda or Goeppert). 



Description. — An elliptical lenticular seed about 9 mm. in diameter 

 and with a smooth surface, probably representing the seed of some 

 leguminous tree, but of uncertain generic affinity. There is a single 

 characteristic specimen in the present collection. Engelhardt's name 

 was used by Corda in 1841 for a Paleozoic fruit and again by Goeppert 

 in 1845 for another Paleozoic fruit, and both have been taken up by 

 later authors, so that the name of the Potosi form has been changed 

 as a slight token to M. Engelhardt, its original describer. 



Holotype.—C&t. No. 35119, U.S.N.M. 



CARPOLITHUS, species No. 1. 



Plate 18, fig. 19. 



A compressed seed or fruit about 7 mm. long and 5 mm. wide 

 with the hilum at one side and surrounded by a narrow marginal 

 wing. Possibly referable to the Aceraceae. 



Cat. No. 35121, U.S.N.M. 



CARPOLITHUS, species No. 2. 



Plate 18, fig. 20. 



A fruit consisting of five spherical nutlets, each about 4 mm. in 

 diameter. 



Cat. No. 35122, U.S.N.M. 



CARPOLITHUS, species No. 3. 



Plate 18, fig. 21. 



A small, obovate, somewhat compressed seed with three longi- 

 tudinal oblique ridges on each face, rounded distad and pointed 

 proxunad, one margin nearly straight and the other full and rounded. 

 About 5 mm. long and 3 mm. wide. Probably corresponds to the 

 unnamed seed figured from Potosi by Britton in his figure 78. 



Cat. No. 35138, U.S.N.M. 



CARPOLITHUS, species No. 4. 



Plate 18, fig. 22. 



A small, somewhat compressed obovate seed longitudinally lined 

 proximad, about 2 mm. long and 1 mm. in maximum width. 

 Cat. No. 35123, U.S.N.M. 



