S8 GEOLOGY OP LOWER MESOZOlC ROCKS OF QUEENSLAND, 



One species of Estheria has been recorded from the Ipswich 

 Series {E. mamjaliensis Jones), and one from the Narrabeen 

 Stage {E. Coghhini Cox). The two species are different, and the 

 Ipswich species lias been identified by Etheridge* with E. tnan- 

 r/aliensif< from the Damuda Beds (Permian) of India. 



Two species of Unio {U. ijJsviciensis and U. eyi'etisis) have 

 been described from the Ipswich Series; and two species of Unio 

 (U. wiaiiamatteiisis and U. Dunstani) together witli two species 

 of Unionella [U. bowralensis and U. Carnei) from the Wiana- 

 matta Stage. They are the only pelecypods recorded from the 

 Lower Mesozoic rocks of New South Wales and Queensland. 



Fosvsil fish have been found somewhat abundantly on certain 

 horizons of the Havvkesbur\^ Series, and in the Talbragar Series: 

 and have been described by Dr. A. Smith Woodward.! 



From the Talbragar Series, seven species were described, all 

 being new. + Regarding the age of this fish fauna, Woodward 

 concludes {op. cit., p. 26) " The Talbragar fish-fauna is, therefore, 

 probably not earlier than the Upper Lias, and may be referable 

 to the Lower Oolites." 



The results of his examination of the fossil fishes from Gosford 

 and St. Peter's are remarkable. The Gosford horizon is about 

 the junction of the Narrabeen and Hawkesbury Sandstone 

 Stages, whereas the St. Peter's horizon is in the Wianamatta 

 Stage, and is some 900 to 1,000 feet above the Gosford horizon. 

 Regarding the fish-remains from Gosford, Wood\vard§ concludes: 

 '' So far as can be determined from the fishes, therefore, the 

 Hawkesbury beds may be regarded as homotaxial 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." 



In the case of the St. Peter's specimens, the fish were collected 

 in two types of matrix, viz., an indurated shale or claystone, and 

 a grey mudstone, the former occurring as several bands sepa- 



" (ieology and Palaeontology of Queensland, p. 397. 

 ♦■ Mem. Geol. Surv. N. S. Wales, Palaeontology, Nos 4, 9, 10. 

 t IhicL, Palaeontology, No. 9. 

 § Ibid., p. 55. 



