DESCRIPTION OF SPECIES. 



FUNGI. 

 PI. I. figs. 56 and (magnified) 56a. 



The specimen fig. 56, twice enlarged, is a fragment of a coniferous leaf 

 (Taxites) which on either side of the midrib presents small circular impres- 

 sions, in the centre of which, on further enlargement (fig. 56a), a small dot 

 is seen. The regular position of the round impressions gives the magnified 

 figure a certain resemblance to a Laccopteris, but the leaf is plainly coni- 

 ferous, and, near the margins, similar round impressions are also present. 

 There is not the slightest doubt that the circular impressions are caused by 

 a parasite fungus ; but that is all that can be said on the matter, as no fur- 

 ther definition can he given. Another coniferous leaf on the same slab is 

 also attacked by a similar fungus, which has, moreover, been observed also on 

 other specimens. 



FILICALES. 



CLAD0PHLEBI8, Brongniart. 



Cladophlebis sp. 



PI. I. figs. 1 and (magnified) 43. 

 This small fragment represents the ordinary Cladophlebis type found in 

 Jurassic deposits, but it cannot be definitely determined as to the species. 



