NOTES AND EXHIBITS. 247 



The President exhibited, on account of the Rev. J. Milne 

 Curran, the following specimens, to which some allusion had been 

 made in his paper upon the Geology of Dubbo : — 



\. Sandstone in an almost unaltered condition, ferruginous, and 

 with a little lime and clay. It contains concretionary nodules and 

 quartz pebbles. 



2. Like No. 1, but with larger proportions of lime and clay, 

 and no pebbles or concretions (in the specimen.) 



3. The same stone in a condition of incipient metamorphism. 

 Divisional planes inclined towards each other at various angles, 

 indicate an approach to the crystalline condition. The grains of 

 quartz still distinct. 



4. Much the same as the last, but less marked in structure. 

 Very friable. 



5. Quartz and felspar separating. The quartz appears to have 

 been at least partially re-deposited from solution, perhaps in water 

 at a high temperature. 



6. Has assumed the appearance of a granitic porphyry, with 

 crystals of quartz. The fractures of the specimen pass through 

 the quartz. 



7. The felspar partially crystallized — Manganese present 



8. Has almost the appearance of a quartz and felspar binary 

 granite, though the structure is rather open or venicular. 



10. A cube of the building stone described in his paper. 



11. A slide of sand grains, illustrating their rounded and 

 abraded character. From the Dubbo sandstone. 



12 and 13. Thin sections of metamorphic sandstone or quartzite 

 in which the several grains are very closely united. On examin- 

 ation by the polariscope these grains were shown to be perfectly 

 crystallized, and not united by any colloidal silica. 



Mr. E. P. Ramsay exhibited (1) some specimens of a new and 

 large species of Ostracode (Estheria) from the Clarence River, col- 

 lected by Mr. Goodrich. (2) Two fungi from the vicinity of 



