DESCIilPTlON OF SPECIES— C1{YPT<J«AMIA—ALG^. 39 



II a I y 111 e n 1 1 c s m i ii o r 7 , F. O. 



Plate I, Fig. 9. 

 Halymmites minor, Fiscb., Oost. D. Fobs. Fuc, pp. 56, 05, pi. xiii, xvi.— Lesqx., Annual Report, 1872, p. 37;t. 

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



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

 u small fragment figured in Urweli der Schiveitz by Ileer. I should liave 

 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 PI. Jurassiques, 1st suppL, pi. Ixviii, fig. 3, under the name of Fhymato- 

 (Irma Ccelatum, Sap., a species of Algce, similar to this H. minor, and Watelet 

 has, in liis Plantes Tertiaires du Basdn de Paris, an Eocene formation, a spe- 

 cies remarkably like H. major. 



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

 ains, etc. 



DELESSEEIA, Lamx. 



Dclesseria f ulva, Lesqz. 



Plate I, Fig. 10. 

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



Frond memhranacoous, 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 i)art, but 

 had to be cut from a rock in place, and, the stone being hard 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 the 



