BY R. VON LENDENFELD, PH.D. 611 



214. RHEGMATODES THALASSINA. Haeckel. 

 This species was obtained off Arnheim's Land, North Coast of 

 Australia. It was described by Peron et Leseur (1), under the 

 name Aequorea thalassina, Aequorea eganea, Peixm et Leseur (2) 

 is identical. De Blainville (3) mentions the latter only. L. 

 Agassiz (4) refers to both.- Haeckel (5) places this species in the 

 Genus Rhegmatodes. 



12. FAMILY CAMPANULINID^. Von Lendenfeld, 1884. 



Colonies of Polyps which are differentiated into alimentary 

 Zooids with one verticil of filiform tentacles and generative 

 Polypes, Polypostyles without mouth or tentacles. Both kinds of 

 Zooids are invested by chitinous capsules. The Polypostyles only, 

 produce by budding sexual Zooids, which. are rudimentary Medusae 

 and never become free. 



No Australian representatives of this family are known. 



13. FAMILY HYDRACTINID^l. Yon Lendenfeld, 1884. 

 HYDRACTINKLE. Claus (?). 



Polyp colonies with free or rudimentaiy Medusa?. The free 

 Medusas belong to Haeckel's Sub-family Cytaeidaa, and posses Ocelli 

 at the base of the tentacles, and no Otoliths. The tentacles are 

 scattered and ecpially distributed. With simple Moutharms. 



The Polyp colonies consist of a dense mass of entwined Hydro- 

 rhiza? from which the Hydrocauli, simple or slightly branched grow 

 forth. The alimentary Zooids possess one verticil of filiform 

 tentacles. The Medusae bud from the Hydrorhiza, or on mouth- 

 less Polyps, Polypostyles, rarely on the alimentary Polyps. 

 Besides the alimentary and Generative Zooids we meet with 

 defensive Spiral Zooids. (P. Wright.) 



(1) Peron et Leseur. Tableau des Meduses. 1809. Planches (in£dites.) 



(2) Peron et Leseur. Tableau des Meduses, 1809. Planches (inedites.) 



(3) De Blainville. Actinologie, 1834, p. 277. 



(4) L. Agassiz. Monograph of Acalephaa. Contrib. Nat. Hist. U.S.A. 

 Vol. IV. 



(5 ; E. Haeckel. Das System der Medusen. Seite 222. 



