26 Mr. T. Hick and Mr. J. Lomax on 



of harder and more lignified elements {Fig. r, Ji). This 

 strand may have been a small vascular bundle, but there is 

 no proof of this. As the section in passing more or less 

 radially through the sterile bracts has missed most of the 

 sporangiophores, we infer that the latter have alternated 

 with the former. We have no information as to the number 

 of sporangiophores in each whorl, but it was probably small. 



The Sporangia. 



The sporangia were arranged round the sporangiophores, 

 but the number connected with each and the mode of 

 attachment is not clearly shown. Where the section of the 

 spike is radial two sporangia, one above the other, are seen 

 between two successive whorls of bracts {Fig. i, sfi.). Where 

 it is tangential, the appearances point to the presence of 

 four sporangia for each sporangiophore {Fig. i, h). The 

 walls of the sporangia are composed of a single layer of 

 cells, whose inner and radial walls are thickened {Fig. j, b\ 

 In the surface view the cells are elongated and the longi- 

 tudinal walls exhibit the projecting transverse processes so 

 often met with in carboniferous sporangia {Fig. 4). No 

 layer of thin walled cells is observable lining the interior, 

 though this may be due to disappearance. The size of the 

 sporangia cannot be definitely stated as they seem to have 

 been cut in all directions, save those which would enable 

 their principle axes to be measured. The one shown in 

 Fig. 1 at the base of the spike has a length of about r6 

 millimetres and a breadth of about o*8 millimetres. The 

 same is shown enlarged in Fig. j, where the point of attach- 

 ment is probably seen at {a). 



The Spores. 



The spores are all of one size, averaging o , o66 millimetres 

 in diameter, and are rounded in shape {Fig j, c). No 



