1084 NOTES ON AUSTRALIAN FOSSILS. 



Fig. 6. — Section a b, of part of the axis. 



Fig. 6 bis. — Sections m n, of part of the pleurss. 



Fig. 7. — One of the principal tubercles surrounded by smaller ones, x 5. 



Fig. 8. — Junction (articulation ?) of the axis with the pleural x 2. 



Fig. 9. — Small barbed spines placed on the front of each of the large spines. 



Fig. 9 bis.— Same, x 2. 



Fig. 10. — Pygidium of Acidaspis Verneuili. x 2. 



Fig. 11. — Head and pleurse of Acidaspis near A. Prevosfi. x 2. 



Fig. 12. —Pygidium of Acidaspis near A. Prevo&ti. x 2. 



Fig. 13. — Head of Acidasjns near A. ?nira. x 2. 



Fig. 14. — Head of Acidaspis near A. mira. x 2. 



Fig. 15. — Pygidium of Lichas sinuata, n. sp., drawn twice natural size, from 

 silicified specimens in the Australian Museum. From the lime- 

 stone near the Wellington Caves. 

 All the specimens here represented are, unless otherwise stated, from Mr. 

 Mitchell's collection ; No. 14 given by him to the Museum. 



Plate xvi. 

 Fig. 1. — Example of a crinoid ( Platycrinus ) with the true basals (b) as 



proximal plates ; r one of the radials. 

 Fig. 2. — Examples of a crinoid ( Rhodocrinus) with five underbasals (u) 



as proximal plates ; r one of the radials . 

 Fig. 3. — Diagram of Tibrachiocrinus corrugatus, Ratte ; showing three 



underbasals (u) ; five basals {b) ; three radials {r) articulated 



with three brachials (br), each of which supports a strong arm ; 



two radials (r") with ankylosed brachials, each of which 



supports two weak or abortive (?) arms ; an azygous plate (a) ; 



an anal plate (x), and a ventral tube (t). 

 Fig. 4. — One of the radials with ankylosed brachial supporting probably 



two arms. 

 Fig. 5. — Cycadoptcris (?) scolopendrina, n.sp., from the Wianamatta Shales, 



natural size, from a specimen given to the Australian Museum 



by Mr. Harber. 

 Fig. 6. — Pinnules enlarged twice, showing the border. 

 Fig. 6 bis. — Section of same. 

 Fig. 7. — Part of surface enlarged to show regular mode of fracture of the 



fleshy parenchyma transformed into coal. 

 Fig. 8. — Baiera tenuifolia, Johnston, a coniferous plant from the Jerusalem 



Coal Basin, Tasmania, natural size, from a specimen in the 



Australian Museum given by Mr. K. M. Johnston, F.L.S. 



Plate xvii. 

 Jeanpaidia (?) palmata, n. sp., from the Wianamatta Shales, natural size, 

 from a specimen in the Australian Museum, given by Mr. 

 Harber. 



