Affinities of the Genus Potliocites. 



33 



abstract contains the principal points wliicli demand our 

 attention : — 



At the base of the spike tlie remains of a whorl of 

 leaves are shown ; in the 

 whorl of leaves immedi- 

 ately below this, one of 

 the leaves reveals its char- 

 acteristic dichotomous 

 structure. In the middle 

 of the preserved portion 

 of the cone, the presence 

 of a second leaf-whorl is 

 indicated by a single leaf. 

 At the upper part of the 

 cone portion is a '' recep- 

 taciilum" so exposed that 

 one is enabled to see its 

 outer surface. He further 

 states that this " recepta- 

 culum" appears as if 

 " divided into four slightly 

 elevated lappets ;" and he 

 supposes that each of the 

 " lappets " corresponds to 

 the position of a sporan- 

 gium attached below. 



The upper surface of 

 this " receptaculum" is un- 

 evenly rough. He further 

 points out that the four 

 " lappets" of the shield 

 are onlyindistinctly separ- 

 ated from each other, 

 being isolated only at the 

 outer edge, but towards 

 their inner grown together. 

 Their dividing line is indi- 

 cated by a shallow radial 

 furrow ; this, he thinks, 

 may perhaps niark the 

 point of the attachment of the " shield" to a stalk 



TKAN8. EOT. SOC. VOL. XVI. 



Branch of Bornia radiata, Biuiigu. {AsiA:ro- 

 phyllitcs spaniophullus, Feistm.), show- 

 ing fragment of a fiuit and foliage. 

 (Copied from Feistmautel, Joe. cit.) 



