114 G. JE. Gordon — Early Stages in Paleozoic Corals. 



tion to the possibility, which I have suggested above, of a 

 specialized condition in Lophophyllum proliferum. Lopho- 

 phyllum is a Carbonic type. It occurs comparatively late in 

 the geological history of the Rugosa. It may, therefore — I 

 should say rather, it must, therefore — have been somewhat 



Figure 4. L. proliferum. Sec- 

 tion from same specimen as in 

 case of figure 3, but a little further 

 from the apex. After Duerden. 



Figure 5. L. proliferum. Section 

 of same corallum as before from 

 about the middle of its length . After 

 Duerden. 



modified from an earlier condition. Whether this modifica- 

 tion took place in the arrangement or order of appearance of 

 the septa there is no absolute means of ascertaining, while one 

 cannot gainsay the possibility that either acceleration, or retard- 



Figure 6. L. proliferum. Sec- 

 tion from upper part of the same 

 corallum as before. After Duerden. 



Figure 7. Section towards the 

 upper region of a fourth individual. 

 After Duerden. 



ation, or both, have operated to produce an apparent anomaly 

 in Lophophyllum in these respects. 



