11G THE AUSTRALIAN* MUSEUM. 



The above list comprises 183 species" a greater number than that 

 (about 176) known from the shores of North-Western Europe, a nearly 

 corresponding area of coast in the northern hemisphere, and the one 

 which has been most exhaustively worked up. But even this large 

 number of species does not complete the Australian Tunicate Fauna, as 

 I have seen from a preliminary examination of the large collections 

 brought back from Australian seas by Professor A. C. Haddon and by 

 Dr. A. Willey, that they each contain some additional undescribed 

 species. This great abundance of species in these southern seas agrees 

 with the view I expressed in the "Challenger" Keport, that Ascidians 

 "attain their greatest numerical development in southern temperate 

 regions," and bears out especially the remark made long before by Quoy 

 and Gaimard, " La Nouvelle-Hollande, dans sa partie sud, et la 

 Nouvelle-Zelande, sont les lieux de predilection des Ascidies en general." 



* Thirty-six of these were recorded by Mr. Thomas Whitelegge in his " List of the 

 Marine and Fresh -'Water Invertebrate Fauna of Port Jackson and Neighbourhood." 

 read before the Royal Society of New South Wales, July 3rd, 1889. 



