PALAEOSTACHYA 61 



3. Palaeostachya. — We will now go on to the 

 second main type of Calamarian fructification, that 

 described by Weiss under the name of Palaeostachya} 



Sin 



ax 



B 



cue 



A 



Fig. 24. — A. Palaeostachya. Radial section of cone, showing peltate sporangiophores 

 (sp) inserted in axils of bracts (br). sm f sporangia; ax, axis of cone. Magnified. 

 Diagrammatised after Renault. B. Archaeocalamites radiatus. Part of cone, 

 showing axis (ax) bearing sporangiophores [(s/>) only. sm, sporangia. Magnified. 

 After Renault. 



Its peculiarity consists in the fact that the sporangio- 

 phores, instead of being inserted midway between 

 the whorls of bracts, are placed in their axils. In 



1 Steinkoklen-Calamarien, i. p. 103, 1876. 



