170 



On the Pre-carboniferous Flora of 



not express any opinion as to their affinities, any farther than to 

 state my belief that they present no important point of structural 

 difference from Cordaites horassifoUa^ and that this plant as de- 

 scribed by Corda,* has a stem closely resembling Lomatofloyos, and 

 therefore of the same type of structure with Ulodendron and Lepi- 

 dodendron. 



5. Cordaites angustifolia. — S. u. 

 Description. — Leaves elongated, one-tenth to one-fourth of an inch wide, 

 with delicate equal parallel striee. 

 This leaf differs from the last in its proportionate narrowness 

 and decided striation. No specimen showing its extremities has 

 been obtained, in consequence of which, I cannot determine 

 whether it has the retuse apex mentioned as one of the charac- 

 ters of Unger's Noeggerathia graminifoUa, which in form and 

 dimensions it much resembles. A very similar leaf, probably the 

 same species, occurs in the Devonian and Upper Silurian of Gas- 

 p^, and is represented in Fig. 11. It was noticed in my paper on 

 the plants of that region, as probably a Noeggerathia. 



6. Sphenoj)Jigllum antiquum. — S. n. 



Fig. (T. — Sphenophyllum antiquum. 

 (a) Magnified, (b) Natural size. 



De&cription. — Leaflets cuneate, one-eighth of an inch wide at apex, and 

 less than one-fourth of an inch long. Nerves three, bifurcating 

 equally near the base, the divisions terminating at the apices of sis 

 obtuse acuminate teeth. 



This is the first occurrence, in so far as I am aware, of the 

 genus Sphenophyllum in beds older than the carboniferous sys- 

 tem. Leaflets only were found, so that it is impossible to state 

 the arrangement of these on the stem ; but the form and nerva- 



* Flora der Vorwelt ; under genus Flabellaria. 



