DE ZIGNO JURASSIC PLANTS. 15 



in several journals last year. In the meantime, with the view of esta- 

 blishing my priority in their discovery, and lest any unforeseen delay 

 occur in the publication, I will here offer a general notice of the spe- 

 cies (the figures of which are for the most part already executed). 



Calamites, sp. Val d'Assa, Vicentin, 1853. 



; sp. Pernigotti, Veronese, 1853. 



Equisetites Veronensis, de Z. 1852. Vald'Aosta; Pernigotti. 



crassinodis, die Z. 1852. Pernigotti. 



elongatus, de Z. 1852. Pernigotti. 



Pecopteris, 2 new species. Rotzo and Val d'Assa, 1853. 

 Taeniopteris, n. sp. ; 2 feet (Ital.) long. Rotzo, 1853. 

 Sagenopteris Phillipsii, Sternb. Pernigotti, 1852. 



, 2 new species. Pernigotti, 1852. 



Cyclopteris, n. sp. Val d'Assa, 1853. 



Cycadites platyrhachis, <?e Z. Val d'Assa; Pernigotti, 1852. 



Zamites, 2 new species. Pernigotti, 1852. 



Pterophyllum, n. sp. M. Durlo, 1853. 



Nilssonia, a very fine new species. Val d'Assa, 1853. 



Otozamites Beani, de Z. Rotzo and Val d'Assa, 1852. 



nov. spp. Rotzo and Val d'Assa, 1852 ; and Pernigotti, 1852. 



Cycadopteris, nov. gen., de Z.* 



Char. — Frons pinnata vel bipinnata, pinnis vel pinnulis integris coriaceis, mar- 

 gine induplicatis, uninerviis, in rachide decurrentibus. 



Of this genus there are five species, three of which I have described 

 and figured, but not yet published : — 



C. Ungeri, de Z. "l 



C. gracilis, de Z. V- Pernigotti and Rotzo. 



C. ornata, de Z. J 



In these above-mentioned localities also occur 



Rhabdocarpus, 1 species. 



Araucarites, 2 species ; one specimen more than 2 feet long. 



Brachyphyllum, 2 species. 



and many other plants of which the genus, and even the family, is 

 doubtful, as 



Tympanophora, Pinnularia, &c. 



The study of this fossil flora has shown my classification of this 

 group of rocks to be correct, as made in 1845 on stratigraphical evi- 

 dence, when I recognized as Neocomian the strata lying above these 

 plant-beds, and assigned all the rocks between the Tagliamento and 

 the Adige to their geological place. Very slight traces of coal and 

 a yellowish bed of marl cover the leaf-beds, and terminate this series 

 of deposits, which in my opinion occupies with us the place of the 

 Great Oolite. 



This view is confirmed by the occurrence of a yellowish rock with 

 Terebratula insignis, and a white, red, and yellow variegated marble, 

 which is the commencement of the superincumbent red ammonite- 

 limestone. The latter I assigned in 1846 to the Oxfordian series : it 

 is characterized with us by 



* Atti deir I. R. Accadeniia di Padova, 1853. 



d2 



