206 W. S. DUN. 



made, — such as fructification of primitive zyrids (?), or 

 portion of one of the Characeae, vesicles for flotation, — the 

 observations of recent years point to the possibility of their 

 being of animal origin, either the egg case of one of the 

 primitive Selachians or a coprolite, such as Spiralium of 

 the Devonian of America. 



It is not proposed to discuss the affinities at the present 

 time, but it is hoped that it will be possible soon to deter- 

 mine the exact horizon of the shale bed from which the 

 fossils were derived, and also to obtain further material 

 which will then form the subject of a more detailed account* 



So far as at present known the shale bed forms either 

 the basal portion of the Wianamatta Stage or an intercal- 

 ated bed in the Upper Hawkesbury Sandstone Stage. 



