GYMNOSPBRMS— CORDAITALES— CORDAICAEPON. 205 



iu different planes, while the fourth lower central dichotomy in the figure 

 leaves much to be desired as to distinctness. However, dichotomy is not 

 unknown in other species of Cordaianthtis. 



It is quite possible that further discoveries of Cordaianthus in these beas 

 will lead to the union not only of Cordaianthus dicJiotomus and C. ovatus,^ 

 but also C. rugosus Lx., the Illinois type of which affords very slight ground 

 for its differentiation. 



Localities. — Vicinity of Clinton, Missouri, No. 9212 of the Lacoe col- 

 lection. Two fragments, perhaps representing C. ovatus Lx., with rather 

 long scales, are from Hobbs's coal mine, U. S. Nat. Mus., 6200; and Deep- 

 water, U. S. Nat. Mus., 6199. 



CORDAICARPON Geinitz, 1862. 



1828. Gardiocarpon Brongniart, Prodrome, p. 87 (pars). 



1857. Gyclocarpon Goeppert and Fiedler, Nova Acta Acad. 0. L. C. jSTat. Cur., vol. xxvi, 



p. 292. 

 1S62. Cordaicarpon Geinitz, Dyas, vol. ii, p. 150. 

 1881, Gordaispermum Bronguiart, in Renault: Oovus bot. foss., vol. i, p. 102 (pars). 



COBDAICARPON CERASIFORME (Presl). 



1838. GarpoUtes cerasiformis Presl, in Sternberg : Fl. d. Vorw., vol. ii, p. 208, pi. x, flg. 9. 

 1884. GarpolWms cerasiformis Presl; Lesquereux, Goal Flora, vol. iii, p. 824, pi. cxi, 

 flg. 18. 



The two specimens which I refer to this species represent a small sub- 

 orbicular, slightly cordiform fruit, the walls of which appear to have been 

 less resistant than those of most of the fruits referred to this genus. Like 

 the fruits described and illustrated by Presl and Lesquereux, they are some- 

 what wrinkled in the compressed state. The outer envelope seems to have 

 been rather thick. The surface is obscurely granular. The fruit from 

 Missouri is somewhat smaller than the one from Arkansas figured in the 

 Coal Flora, it having in fact very nearly the size of the one shown in 

 Presl's figure. The specimens are also smaller and less apiculate than 

 Zeiller's Cordaicarjms Boidayi? 



At first I was disposed to regard these bodies as sporangia, but the 

 texture is quite different from any sporangia I have seen, while the presence 



' The reference, on p. 933 of the 3d volume of the Coal Flora, of fig. 6, pi. Isxvi, to Cordaianthus 

 ovatus is probably a mechanical error. 



'Fl. foss. bassin houill. Valenciennes, Atlas, pi. xciv, figs. 14, 14a. 



