PLATES AND EXPLANATIONS. 
Plates X-XX were prepared and reproduced by Mr. A. E. Dyer, and Plates 
XXI-XXVIXI were drawn by Mr. F. K. Leggatt, and lithographed 
by Mr. E. W. Minchen, at the Government Printing Office, Sydney, 
under the direction of Mr. W. A. Gullick, Government Printer. 
PLATE X. 
Tryplasma Lonsdalei, Etli. fil. 
Fig. 1. Large convex block seen from the base. 
Fig. 2. Mass of weathered corallites. * 
a. Fistulas. 
Fig. 3. Another series of corallites, less weathered than in Fig. 2. 
a. Double gemmation. 
