CARBONIFEROUS LYCOPODS AND SPHENOPHYLLS. 



109 



of rhizomes and tap-root like growths bear quincuncially arranged 

 rootlet scars, similar in structure to those of Stigmaria. Cast 

 of pith cavity ribbed (like the internal cast of a calamite, but 

 without joints). 



Remarks. — Although Stigmariopsis was founded by Grand 

 'Eury, it is to Solms-Laubach we are indebted for pointing out the 

 characters by which it can be distinguished from Stigmaria. 



Fig. 19. — Stigmariopsis ariglica, Kidston. Monckton Main Colliery, 

 Barnsley, Yorkshire. Hor. Barnsley Thick Coal, Middle 

 Coal Measures. (No. 2342.) 



When dealing with Stigmaria, Stigmariopsis has been so often 

 referred to in its supposed connection with Stigmaria that I need 

 only say here that I accept the genus Stigmariopsis as possessing 

 an autonomous existence, and not in any way connected with Stig- 

 maria, except in its close affinity to that genus. In other words, 



