NOTES AND EXHIBITS. 1059 



NOTES AND EXHIBITS. 



The following note was read for Mr. John Mitchell, in correction 

 of some remarks made in our Proceedings for June, in reference 

 to some fossils from Bowning exhibited by him. " The late Rev. 

 W. Clarke, F.R.S., had declared the geological formation of 

 Bowning co be of Devonian age, having been led to this conclusion 

 chiefly by the occurrence of Calceola sandalina, which European 

 geologists recognise as a typical Devonian fossil. But above the 

 series of rocks from which this fossil has been obtained, as well 

 as in conjunction with it, I have collected a number of Trilobites 

 that are typical of the Upper Silurian, particularly several species 

 of Acidaspis (a genus not hitherto recorded from Devonian strata), 

 Harpes itngida, Staurocephalus Murchisonii, Encrinurus punctatus, 

 several species of Galymene and others, all Silurian types, whereas 

 from the remarks referred to, it would appear that these fossils 

 were from beds underlying the supposed Devonian strata. Hence 

 from the evidence furnished by these fossils I am of the opinion 

 that the formation is decidedly Upper Silurian. I may also add 

 that, in so far as it applies to the geology of Yass, the error was 

 pointed out some time ago by Mr. Jenkins, L.S." 



Dr. Ramsay exhibited a specimen of an apparently new 

 species of Monacanthus, presented to the Australian Museum 

 by Mr. G. R. Eastway. He also exhibited eggs of Ptilo- 

 norhyncus violaceus, and Rhynchcea australis, and read the 

 following notes on the subject: — (1) Ptilonorhynchus violaceus> 

 Yieill. (P. holosericeus, Kuhl). " In the Proceedings of the 

 Zoological Society of London for 1875, (March 2nd,) p. 112, 

 where I first described the egg of this species, I laid stress 

 on the peculiar short ivavy and irregidar markings, drawing 

 attention to the somewhat similar characters exhibited on the eggs 

 of Chlamydodera metadata ; at that time I had only two perfect 

 specimens from nests taken in the Wollongong district. Since 



