428 THE GEOGRAPHICAL DISTRIBUTION OF THE SCYPHOMEDUSiE, 



Crambessa mosaica. Haeckel (1.) 

 This Medusa is, without doubt, the most common in those parts 

 of Australia and its waters that have been visited by me. It has 

 also been mentioned by a long list of authors. It has been 

 described by Quoy et Gaimard (2) under the name of Cephea 

 mosaica from Port Jackson, and since by Huxley (3) as 

 Rhizostoma mosaica from the same place. I have found it 

 myself (4) in Port Phillip, Melbourne, and in Port Jackson, 

 Sydney. The Melbourne specimens are blue and more delicate, 

 those from Sydney brown and coarse. 



It is found in immense swarms, and is more common in 

 Melbourne than in Sydney. After a storm in Port Phillip at 

 high water mark one often finds these Medusae on the beach in a 

 row, from 2 to 4 meters wide, lying one over the other in a thick 

 mass further than the eye can reach. 



Thysanostoma thysanura. Haeckel. 

 This Medusa was sent to Haeckel (5) from the Godefroy 

 Museum, without any more exact mention of the place where it 

 was found than New Zealand. 



Leonura leptura. Haeckel. 



This Rhizostoine found in New Zealand has been described by 

 Haeckel (6.) 



When we compare these Rhizostomaa with those from other 

 waters we are first struck by the fact, that although a few species 

 extend from North Australia towards India, still by far the 

 greater number are only met with on the Australian coast, and 

 again that we only know very few species which have been 

 found in more places than one. The following table shows the 

 peculiarity of these circumstances : — 



(1.) E. Haeckel. Das System der Medusen. Seite 625. 

 (2.) E. Haeckel. Das System der Medusen. Seite 622. 

 (3.) Quoy et Gaimard. Voyage de l'Uraine Zoologie, p. 569. 

 (4.) Huxley. Philosophical Transactions, 1849, p. 422-432. 

 (5.) R. von Lendenfeld. Scyphomedusa? of the Southern Hemisphere. 

 Proceedings of the Linnean Society of New South Wales, 1S84. 

 (6.) E. Haeckel. Das System der Medusen. Seite 631. 



