OF NEW SOUTH WALES. 21 



that Encalypfns seed had frequently loeen sold under fictitious 

 names, the seeds of common and inferior kinds having been 

 substituted for the more valuable descriptions. 



Mr. Brazier exhibited a collection of sternums of Fowls dis- 

 playing the effect of different kinds of perches in modifying the 

 shape and curvature of the ridge. Mr. Brazier showed that 

 where the fowls roosted on a round perch the breast bone was 

 normal ; but those that roosted on flat battens had the breast bone 

 distorted. 



Mr. Masters exhibited a Majaqueus Tarkinsoni or New Zealand 

 Petrel shot near Sydney Heads, and remarked that it was the first 

 recorded instance of this bird visiting the Australian Coast. 



MONDAY, MAY 27th, 1878. 



W. J. Stephens, Esq., President, in the Chair, 



MEMBERS ELECTED. 



Charles Jenkins, Esq., L.S., Yass, and T. Tenison- Woods, Esq., 



Sydney. 



donations. 



From La Societe Entomologique de Belgique : Compte Rendu, 



Series II., No. 49. 



PAPERS READ. 



ON THE GEOLOGY OF YASS PLAINS. 



By Charles Jenkins, Esq., L.S., Yass. 

 Flate VL 

 In offering an account of some years' labor in the fossiliferous 

 strata around Yass, I must apologize for not giving at present all 

 the detail that may be desired. I find it impossible to accompany 

 this paper with the necessary plans and sections, the result of 

 surveys I have made, without which minute description would be 

 unsatisfactory. I hope, however, in a future paper to supply the 

 information I am now compelled to omit, accompanied by draw- 

 ings of as many of the principal fossils as possible. 



