340 



CALAMITES. 



[CH. 



consists of parenchyma traversed by lacunae and limited 

 peripherally by a denser hypodermal tissue. In the stele 

 Renault describes 14 xylem strands, each with a large carinal 

 canal. The pith was apparently large and hollow. The same 

 author describes an Annularia strobilus in which the lower 

 sporangiophores bear macrosporangia, and the upper micro- 

 sporangia. 



m 



Fm. 89. Annularia sphenophylloides (Zenk.). 



A. Strobilus {Stachannularia calathifera, Weiss), f nat. size. B. Vege- 

 tative shoot. 4 nat. size. 

 From specimens in the Collection of Mr E. Kidston. Upper Coal- 

 Measures, Eadstock. 



The references in the footnote should be consulted for 

 figures of this species of Annularia ; it is from the examination 

 of such specimens as are referred to in the note that the above 

 diagnosis has been compiled \ 



1 One of the finest specimens of Annularia stellata is figured by Stur (87), 

 PL XVI b; it is in the Leipzig Museum. Vide also Schenk (83), PI. xxxix. ; 

 Germar (44), PL ix. ; Eenault and Zeiller (88), Pis. xlv. and xlvi. There are 

 some well-preserved impressions of A. stellata in the British Museum from 

 Eadstock, Newcastle and elsewhere. 



