BY THE REV. J. E. TENISON-WOODS, F.G.S., P.L.S. 101 



them which has been Damed Aneimidium, by Schimper, and which 

 can scarcely be separated from living forms, except in this, that 

 the veins are closer and more numerous. There are two species 

 known from the Wealden of North Germany. The diagnosis of 

 the genus is thus given : — Fronds pinnate, pinnae coriaceous, 

 simple, oblong, ligulate, symmetrically, and unsymmetrically 

 obovate, base inserted, gradually narrowed. Neuration distinct, 

 thickened towards the base, often forking, and all the venules free 

 and reaching the margin. 



" The great resemblance which these species manifest to several 

 species of Aneimia,* and the almost complete correspondence of 

 the venation has induced me to give to these plant remains of the 

 Cretaceous period the name of Aneimidium." — Schimper, Pal. 

 Veg., vol. 1, p. 485. 



If we were sure of the horizon to which this species of Neurop- 

 teris belongs, its presence might cause interesting speculation. It 

 has been found simply in a waterworn stone in the river bed. 

 There are no known paleozoic plant beds near, and its aspect is 

 certainly not that of a paleozoic fossil. The formation on which it 

 rested was a marine Devonian limestone, with corals. 



Thinnfeldi a. — Ettingshausen. f 



Fronds pinnate, segments or pinnae oblong, ovate lanceolate, 

 decurrent, and confluent at the base, coriaceous, costa divided into 

 many veins, venules and veinlets, before reaching the apex ; veins 

 emerging at a slight angle, diverging in ascending, and often 

 forking, venules or veinlets reaching the margin Stomata in both 

 sides of the lobes. Obs. — The frond is generally dichotomous, 

 and is with the leaves of a thick and fleshy habit. It belongs in 

 Europe to the lower Lias and Ilhsetic formations. 



* From avei/iatv, without clothing (a priv. eipa, vesture), in allusion to 

 the naked infloresence. Many writers on Ferns, such as Smith, Moore, 

 Hooker, write Anemia, which is the orthography of Swartz, the founder of 

 the genus. 



t Begrundung einiger neuen nicht genau gekannten Arten der Lias u. d. 

 Oolith flora. (Abhand. d. k. k. geol. Reichsanst, I. 3, No. 3. p. I.) 



