Pig. 18. — Monograptus atavus, sp. nov. 

 18b. 18 a. 



Fragment near the proxi- 

 mal end, to show the 

 strongly sinuous thecse 

 fX5). 



Eheidol Gorge (P. 13.) 

 Reg. no. 23710. 



18. 



18 a. — Fragment near the 

 proximal end, showing 

 the form of the thecae 

 and of the polypary 

 <X5). 



Eheidol Gorge (F. 14). 

 Eeg. no. 23706. 



18 c. — Distal fragment. 



showing the form of 



the thecEe (x 5). 

 Eheidol Gorge (F. 14). 

 Eeg. no. 23707. 



18 d.— Distal fragment 



(X2). 

 Eheidol Gorge <F. 13). 

 Eeg. no. 23711. 



