PHYLLOTHECA. 19 



ovate bodies occur closely attached to the node, and these may 

 possibly be sporangia. 



I have recently shown elsewhere l that McCoy's species, P. ramosa 

 and P. Hookeri (in part), cannot be clearly distinguished from 

 Brongniart's Phyllotheca australis. The former differs only in 

 possessing branched stems, while in the latter species the leaf- 

 sheath appears to be rather looser, and less closely applied to the 

 stem than in P. australis. Under the name P. Hookeri, McCoy 2 

 has also included some "coarsely sulcate or ridged stems," which 

 are now removed to another species, P. deliquescens (Gopp.), see 

 p. 22, as they are believed to be identical with the Siberian 

 species described under that name by Goppert and Schmalhausen. 

 The type-specimens of McCoy are in the Sedgwick Museum, 

 Cambridge. 



Phyllotheca australis is known only from Australia and Tasmania. 

 Stem-casts and impressions. 



V. 7285. PI. II, Fig. 6. 



A fragment of a stem, 6'3 cm. long and T5 cm. broad, showing 

 two nodes and three internodes. The longitudinal striations on the 

 internodes are very faint. The ridges are puckered at the node. 

 Leaves are absent in this specimen. 



Port Stephens, New South Wales. Odinheimer Coll. 



V. 7217. Several fragments of stem-casts, one of which is 

 2-8 cm. broad and 8*9 cm. long. The ridges are continuous, and 

 slightly tumid at the node, and the scars of the vascular bundles 

 of the leaves are seen between them. A smaller fragment shows 

 a branch -scar. 



Port Stephens, New South Wales. Odinheimer Coll. 



V. 7228. A cast much more strongly ribbed than in the 

 preceding specimens, and possibly of the nature of a pith-cast. 

 The node is somewhat constricted, and the ridges are apparently 

 not continuous in all cases. 



Australia. Odinheimer Coll. 



V. 7218. Fragments of stem-casts associated with leaf-sheaths. 

 One cast shows a branch -scar. The ridges at the node are 

 puckered, and the vascular scars are plainly seen. 



Port Stephens, New South Wales. Odinheimer Coll. 



1 Arber (02 1 ), p. 14. 2 McCoy (47), p. 157. 



