68 Chapman, Silurian Fossils of South Yarra, &c. [^Augil^f'' 



taxodont hinge, and frequently with both valves extended, 

 attached along the hinge-line. This species occurs also at 

 Moonee Ponds Creek, Anderson's Creek, Broadhurst's Creek, 

 and Eraser's Creek. 

 Y. PalcBoneilo spectabilis, Chapm. 



Ref.— Chapman ('08), p. 35, pi. III., figs. 51, 52. 



Occurs also at Jolimont. 

 Y. D. Pakeoneilo producta, Chapm. 



Ref.— Chapman ('08), p. 36, pi. III., figs. 53, 53A. 



Found also at Kilmore. 

 Y. PalcBoneilo (?) constricta, Conrad, sp. 



Ref.— Chapman ('08), p. 36, pi. III., fig. 54. 

 Y. Parallelodon (Equalis, Chapm. 



Ref.— Chapman ('08), p. 39, pi. IV., fig. 57. 

 Y. (?) Pterinea tenuistriata, M'Coy. 



Ref.— Chapman ('08), p. 41, pi. IV., fig. 61. 



This species occurs in the Wenlock and Ludlow series in 

 England. 

 D. Conocardium (?) costalum, Cresswell, sp. 



Ref.— Chapman ('08), p. 45. 



Typical specimens occur in the Yeringian limestone of Cave 

 Hill, Lilydale. 

 Y. Aviculopecten spryi, Chapm. 



Ref— Chapman ('08), p. 49» pi. V., fig. 75. 

 Y. Modioloi^sis melhournensis^ Chapm. 



Ref — Chapman ('oS), p. 50, pi. V., figs. 76, 76^. 

 Y. Modiolopsis complanata, Sow., sp. 



Ref— Chapman ('08), p. 50, pi. V., fig. 77. 



Several examples of this striking form have been found. Its 

 occurrence here is especially interesting from the fact that it is 

 also found in Great Britain, in rocks ranging from the Wenlock 

 to the Downtonian (Upper Silurian). 

 D. Modiolopsis nasuta, Conrad, sp., var. australis, Chapm. 



Ref— Chapman ('08), p. 51, pi. VI., fig. 78. 

 Y. Goniophora, cf. glaucus, J. Hall, sp. 



Ref— Chapman ('08), p. 53, pi. VL, fig. 81. 



GASTEROPODA. 



Y. Bellerophon, sp. 

 Y. Cyrtolites, sp. 



PTEROPODA. 



Y. Coleolus (?) aciculum, J. Hall. 



Ref— Chapman ('04), p. 339, pi. XXXI., fig. 7. 

 Y. D. Hi/olithes spi'iji, Chapm. 



Ref— Chapman ('04), p. 340, pi. XXXI., fig. 9. 



This species has also occurred in the shales from the telephone 

 tunnels in Swanston-street, Melbourne. 

 Y. Conularia ornatissima, Chapm. 



Ref— Chapman ('04), p. 341, pi. XXXI., figs. 13, 14. 



