from the Lanarkshire Coal-field. 



495 



about 1 millim. wide, lying parallel to each other, and about 

 4 centim. apart. The fragments of these stems are each about 

 7 centim. long; but in no case is their upper extremity or 

 their attachment to the parent branch shown. That tliey 

 originally s])rang from a common stem is probable from their 

 relative positions. 



On the branchlet lettered a (see sketch"^) are seen the remains 



of six thorn-like projections; these are 12 millim. apart; on 

 that lettered h four are shown, but there has evidently been 

 another between the third and the fourth ; these are from 12- 

 13 millim. apart. On the remaining stem, c, seven of these 



* The branclilets have been approximated, to enable them to be 

 broupfht into the woodcut. 



