50 ON THE STRUCTURE OP ANNULARIA AUSTRALIS. 



to have a much more coriaceous texture, judging from the figures 

 just quoted, than do those of Annularia australis. An attentive 

 examination of the specimens now under description has quite 

 failed to detect any transverse veining of the leaves. The entire 

 absence of such a striation becomes more marked from the 

 definite outline of the midrib. 



It would appear therefore that the reference of this plant by 

 Prof. Feistmantel to Annularia is strictly accurate, and that it 

 does not correspond to the structure of Cyclopitys of Schmal 

 hausen. 



EXPLANATION OF PLATES. 

 Plate II. 



Fig. 1. — Foliage of Annularia aiistralis, Feistmantel ; nat. size. 



Fig. 2. — Portion of a verticil enlarged to show the midrib of each leaflet, 

 but without cross striation. 



Plate III. 



Fig. 1. — Stem with articulations, internodes, branches, and traces of 

 leaves ; nat. size. 



