NOTICE. 



The Royal Society of New South Wales originated in 1821 as 

 the "Philosophical Society of Australasia"; after an interval of 

 inactivity, it was resuscitated in 1850, under the name of the 

 " Australian Philosophical Society," by which title it was known 

 until 1856, when the name was changed to the "Philosophical 

 Society of New South Wales"; in 1866, by the sanction of Her 

 Most Gracious Majesty Queen Victoria, it assumed its present 

 title, and was incorporated by Act of the Parliament of New 

 South Wales in 1881. 



TO AUTHORS. 



Authors of papers desiring illustrations, are advised to consult 

 the editors (Honorary Secretaries) before preparing their drawings. 

 Unless otherwise specially permitted, such drawings should be 

 carefully executed to a large scale on smooth white Bristol board 

 in intensely black Indian ink, so as to admit of the blocks being 

 prepared directly therefrom, in a form suitable for photographic 

 "process." The size of a full page plate in the Journal is 4 J in. 

 x 6 J in. The cost of all original drawings, and of colouring plates 

 must be borne by Authors. 



ERRATUM. 



Page 59, line 2, for " predominance of peripheral over radial contraction 

 etc.," read "predominance of radial over peripheral contraction etc." 



