Z\L A MONOGRAPH OF THE AUSTRALIAN SPOXGES. 



Fig. 13. — Chondrilla papillata. R. v. L. Natural size, drawn from a spirit 

 specimen. 



Fig. 14. — Chondrilla papillata, R. v. L. Transverse section through outer 

 zone, showing a Papilla densly filled with spicules 70:1 



Fig. 15.— Chondrilla papillata. R. v. L. Spherical spicide. 300:1 



Fig. 16.— Chondrilla papillata. R. v. L. Stellate spicule. 300:1. 



Fig. 17. — Chondrilla corticata. R. v. L. Natural size, drawn from life. 



Fig. 18. — Chondrilla corticata. R. v. L. Transverse section through the 

 outer zone 60:1, showing the dermal pavement skeleton. 



Fig. 19.— Chondrilla corticata. R. v. L. A spherical spicule. 300:1. 



Fig. 20. —Chondrilla corticata. R. v. L. A stellate spicule. 300:1. 



