FOSSIL PLANTS FE.OM NAGATO. ^41 



Fos.sils, where there they are found in alnindiince, are generally 

 very well preserved. Owing, hcnvever, to the l)ritt]e nature of the rock 

 containing them, it i,s very ditticidt to oljtain any large .specimen. 



After these brief preliminary remtirks I shall first p:iss to the 

 description of the species, and then to the conclusions which can be 

 drawn from them. 



Description of the Species. 



1. Asplenium Roesserti Fresl sp. 

 VI. XXXII, Fig. 1-5, Pi. XXXIV, Fig. 2. 



Asplen'niin Roesserti Schenk, Fossile Pflanzen aus der Albourskettc gesammelt 

 von E. Tietze, p. 2, pL I, fig. 2-1, II, 8-10, IV, 19, VI, 33, VII, 3G. 



Ayilcnitea llnesscrti Schenk, Foss. Flora d. Grenzschichten d. Keupers u. Lias 

 Frankens, p. 49, pl. VII, fig. O-Ta, X, 1-4. Zeiller, Examen de la Flore foss. des 

 Couches de Charbon du Tongking, p. 302, pl. X, fig. 3, 3a. 



Chlailtijilt/clii.s itvhliL'Jt.se rar. lloesserti Nathorst, Floran vid Höganas och Helsinrr- 

 borg p. 42, Helsingborg pl. II, fig. 1-3. 



All of our specimens excepting fig. 3, 4, pl. XXXII agree so 

 well with the figures of Aspleniuiii Eocsseiii given by Schenk and 

 Nathorst, tliat I have not the slightest douljt about their identity with 

 this well known species. Tlie pinnules are more or less falcate and 

 inclined forward, witli secondary veins only once forked. As to the 

 form of the pinnules, I must say that they are very varialjle, bein"- 

 sometimes long and fino-er-like, sometimes short and triangular, as 

 may be sufficiently seen from the spechnens here figured. The 

 arrangement of pinna' along tlie |)i-inci[)al rhachis is in our specimens 

 o[)posite or suljoppositc which according to Schenk is said to be the 

 case in the l(jwer part of the fr(jnd. 



