178 Proceedings of the Royal Society of Victoria. 



Fig. 13. — Tetragraptus decipiens, n. sp., nat. size. 

 „ U. „ „ „ „ „ 



,, 15. „ ,, same specimen as 14 x 3^. 



,, 16. ,, ,, specimen with 6 l>ranches, 



nat. size. 

 ,, 17. — Tetragrajjtus decipiens, nat. size. 



„ 18. „ „ „ „ 



„ 19. „ „ portion showing thecae x o. 



(Figs. 17-19 Coll. G. B. Pritchard). ^ 

 20.— Clonograptus flexilis, J. Hall, x h (Coll. G. B. 

 Pi-itchard). 

 ,, 21. — Clonograptus rigidus, J. Hall, nat. size (Coll. G. B. 



Pritchard). 

 „ 22. — Clonograptus rigidus, thecae x 3| (Coll. G. Sweet). 

 „ 23. „ ,, var tenellus, Linnars., nat. size. 



24 

 „ 25. ,, ,, ,, „ another specimen 



X 3i. 

 „ 26. — Phyllograptus sp. (Coll. G. Sweet). 



,, 27. — Dictyonema macgillivrayi, T. S. Hall, thecae enlarged, 



(Coll. G. B. Pritchard). 

 „ 28, 29. — Dictyonema pulchellum, n. sp., nat. size. 

 ,, 30. ,, ,, portion of 29 enlarged, 



showinir thecae. 



