XIV] 



LYCOSTROBUS 



89 



of Palaeozoic Lepidostrobi, the cones of Lepidodendron. The 

 Swedish fossil from Upper Rhaetic strata of Helsingborg (Scania) 

 was originally designated Androstrobus Scotti, the generic name 

 being adopted in view of the close resemblance of the form of 

 the strobilus to the male flower of a Cycad. A more complete 

 examination has shown that the bodies, which were thought to 



Fig. 139. Lycostrohus Scotti, Nath. (After Nathorst ; | nat. size.) 



be pollen-sacs — though Nathorst recognised certain differences 

 between them and the pollen-sacs of lycopods — are the 

 megaspores of a lycopod. Microspores have also been identified. 

 The axis of the cone has a breadth of 2 cm. with a peduncle 

 which may be naked or provided with a few small scales ; the 



