80 Proceedings of the Royal Society of Victoria. 



Fig. 3. — F. margaritifera^ sp. no v. Portion of poriferous surface, 

 showing the arrangment of the zooecia and the 

 tuberculate keel. From a wax impression. 

 X 40. [593]. 



,, 4. — Craniella lata, sp. nov. Dorsal aspect of specimen 

 attached to a Cycloceras, x 2. [896]. 



,, 5. — Orbiculoidea selwvnt, sp. nov. Pedicle valve. x 4. 

 [614]. 



,, 6. — O. sehvyni, sp. nov. Brachial valve ; 6a, ditto, side view. 

 X 4. [612]. 



„ 7. — Siphotiotreta australis, sp. nov. Pedicle valve. x 2. 

 [605]. 



,, 8. — J), australis, sp. nov. Apical end of valve showing fora- 

 men, x 2. [603]. 



,, 9. — Lingula spryi, sp. nov. ? Ventral valve; 9a, edge view. 

 X 3. [598]. 



,, 10. — L. lalior, sp. nov. ? Dorsal valve; lO^i, edge view. 

 X 3. [597.] 



,, 11. — Fenestella australis, sp. nov. Portion of zooecial 

 surface including some of the bifurcating branches. 

 X 7. [1205a]. 



,, 12. — Orbiculoidea selwytii, sp. nov. Internal aspect of a 

 pedicle valve, showing the tube partially enclosed 

 by a callus. x 15. [613]. 



,, 13. — Siphonotreta australis, sp. nov. Internal cast of a 

 pedicle valve. x 2. [611]. 



,, 14. — Craniella lata, sp. nov. Outline sketch showing the 

 position and form of the vascular sinuses, with the 

 posterior and sub-central adductor impressions 

 X 2|. [896]. 



Plate XI. 



Fig 1. — Siphonotreta australis, sp. nov. Brachial valve; a large 

 specimen. x 2. [608] 

 „ 2. — Chonetes melbournensis, sp. nov. Interior of a brachial 

 valve showing cardinal process. The matrix above 

 the hinge line of the shell carries the casts of spines 

 left by the removal of the area of the pedicle valve. 

 X 3. [1419]. 



