54 PROCEEDINGS OP THE GEOLOGICAL SOCIETY. [Apr. 28, 



fructification, shown in his figure, but on the other hand shows the 

 marginal teeth more distinctly. 



5. Asjoidium ? 



A fragment of a Fern of very distinct character, but ill-preserved ; 

 materially different from any in Heer's list. It has the appearance 

 of an Asjoidium {Polystichum, Presl), of the group of which Aspi- 

 dium aculeatum is the type ; and may possibly even be a variety of 

 that species ; but does not agree with the form {Asp. angular e, 

 Sm.) now existing in Madeira. It comes nearer to the Aspidium 

 lohatum of British authors ; but perhaps nearer still to Asp. vestitum, 

 Swartz. 



6. Nephrodium ? ? 



A fragment too imperfect for determination, but certainly different 

 from any noticed by Heer, may possibly have belonged to some 

 species allied to the Nephrodium (Lastrea) Filioc-mas ; but I am 

 not able to identify it. Remarkable for the remoteness of the side- 

 veins, in which it differs materially from all the varieties of Pteris 

 aquilina, and all the allied species that I have seen ; otherwise, in 

 the breadth and position of the leaflets it is not unhke some of the 

 broadest forms of that species. 



7. Nephrodium? 



Another small fragment of a Fern, scarcely admitting of satis- 

 factory determination. Differs from all the varieties of Pteris 

 aquilina in the formation of the side-veins, which are perpen- 

 dicular to the midrib, not recurved, and uniformly once-forked, the 

 bifurcation taking place very near their base ; the leaflets too are 

 closely contiguous. The lowest side -veins of every two adjoining 

 leaflets meet in the sinus, not below it ; whereby this is clearly 

 disting-uished from Nephrodium molle, N. unitum, and the rest of that 

 group. Has the appearance of a Lastrea or Polypodium, but does 

 not well agree with any of those now existing in Madeira. 



8. Adiantum? psy diodes, C. B. 



A single leaflet (apparently) of a very singular Fern, remarkable 

 for its exact resemblance in shape to a butterfly's wing. The free 

 and regularly dichotomous veins lead me to think it a Fern, rather 

 than an insect's wing ; and if it be a Fern, it is most probably 

 either an Adiantum or a Lindscea, though materially different from 

 any that I know. 



II. Monocotyledons. 



9. Cyperus ? 



A fragment of a leaf, evidently belonging to some large Grass or 

 Cyperaceous plant ; more probably the latter. The strong sharp keel, 

 parallel margins, and numerous fine parallel veins are character- 

 istic. 



III. Dicotyledons. 



10. Laurus Canariensis (Webb and Berthelot) ? 



The most abundant dicotyledonous leaves in the S. Jorge bed 



