OCCURRENCE OF T^ENIOPTERIS IN A COAL SEAM. 555 



Mesozoic ? = Jurassic). The Tonkin deposits are regarded 

 as of Rhsetic age, in this latter case it is of some interest 

 to note that the fossil fish of Gosford, which are considered 

 by David to occur in beds either at the base of the Hawkes- 

 bury or top of the Narrabeen Stage x , point to a possible 

 age as based on a correlation with European fish faunas, of 

 which Smith Woodward says 2 "So far as can be determined 

 from the fishes, therefore, the Hawkesbury beds may be 

 regarded as homotaxical with the Keuper of Europe, or at 

 latest, with the Rhsetic, and on the whole, the present 

 writer is inclined to adopt the first of these interpretations." 



Associated with the leaf is the impression of an insect's 

 wing, a description of which will be submitted later. 



1 The Fossil Fishes of the Hawkesbury Series at Gosford. M. Geol. 

 Surv. N.S.W., Pal. iv, 1890, p.8. 3 Ibid., p. 55. 



