DESCRIPTION OF SPEOIES— CEYPTOGAMIA— ALG^. 39 



II a I y III e n i t c s m i n o r ! , F. O. 



Plato I, Fig. 9. 

 Ealymeniles minor, Fisch., Oost. D. Fobs. Fuc, pp. 56, 65, pi. xiii, xvi.— Lesqx., Annual Report, 1872, p. 373. 

 Branches small, half a centimeter hroad ; tubercules small and flat. 



The European species is known to me from description only, and from 

 a small fragment figured in Urwelt der Schiveitz by Heer. I should have 

 considered the fragment figured here as a branch of the former species, if the 

 tubercles were not much smaller and all flattened, apparently in a natural 

 way, and not by erosion. It is, however, admissible that, variable in its size, 

 its ramification, and other characters, as is the former species, it may be 

 represented also by fragments like the one doubtfully referred to H. minor, 

 a species which, according to Schimper, is already uncertain, and established 

 from insufficient materials. 



Marine plants of the same type as these have been remarked in Europe 

 in the Jurassic and the Eocene formations. Count Saporta has represented, 

 in Fl. Jurassiques, 1st suppl., pi. Ixviii, fig. 3, under the name of Phymalo- 

 dfrma Cmlatum, Sap., a species of Algce, similar to this .K minor, and Watelet 

 has, in his Plantes Tertiaires du Bassin de Paris, an Eocene formation, a spe- 

 cies remarkably like H. major. 



Habitat. — Sandstone beds of the Lower Lignitic; Raton Mount- 

 ains, etc. 



SELESSERIA, Lamx. 



« 



Dclesscria f til va, Leciqz. 



Plate I, Fig. 10. 



Delesseria fulva, Lesqx., Annual Report, 1872, p. 376. 



Frond membranaceous, dichotomous, long, linear, with an irregularly inflated middle nerve; 

 divisions linear, distant, alternate, obtuse, enlarged and lobed at the point. 



This fucoidal frond, or probably a mere branch of a frond, is remarkably 

 fine, its brown-reddish color contrasting with the white sandstone wherein it 

 is imbedded. The specimen was originally larger than the figured part, but 

 had to be cut from a rock in place, and, the stone being hanl as flint, it was 

 impossible to break it out in its full shape. The part left out, however, did 

 represent only one more of the lower divisions, of which some traces are left, 

 indicating its length and its increasing width toward the top. The main 

 branch, measuring twenty centimeters long, before breaking it, is a little 

 more than one centimeter broad, dichotomous, the lower branches more 

 distant and longer than the upper ones, nearly all equally dilated toward tiie 



