BY R. VON LENDENFELD, PH.D. 609 



209. ZYGOCANNA PLFURONOTA. Haeckel. 



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

 Australia, and described by Peron et Leseur (1) under the name 

 Aequorea pleuronota. Leseur (2), refers to it under the same 

 name. Eschscholtz (3) .describes it as Polyxenia pleuronota. 

 Haeckel v 4) refers it to the Genus Zygocauna. 



55. GENUS ZYGOCANNOTA. Haeckel. 



Aequoridse with twelve dichotome Radial Canals. Crisp-shaped 

 Gonads in the shape of composed branches at the terminations of 

 the 24 branches. Stomach broad and flat without stalk. Mouth 

 wide. Margin of mouth simple without flaps or frils. 



210. SPECIES ZYGOCANNOTA PURPUREA. Haeckel. 

 This species was obtained off the Western Coast of Australia, 

 and described by Peron et Leseur (5), as Aequorea purpurea. 

 Leseur (6), Milne Edwards (7), and L. Agassiz (8), mention it 

 under this name. Eschscholtz (9), describes it as Polyxenia 

 purpurea. Haeckel (10) places it in the Genus Zygocannota. 



56. GENUS ZYGOCANNULA. Haeckel 



Aequoridse with numerous, 16 or more, dichotome Radial 

 Canals. A Gonad on each branch. Stomach at the termination 

 of a large conical stalk, split up into mouth-flaps. The splits reach 

 nearly to the stalk. Mouth-flaps large and folded. 



(1) Peron et Leseur. Tableau cles Meduses. 109, p. 338. 



(2) Leseur. Recueil des Planches fineYlites) des Meduses, 1839, Planche 

 XL, fig. 3-6. 



{3) Eschscholtz. System der A calephen, 1829. Seite 119. 



(4) E. Haeckel. Das System der Medusen. Seite 215. 



(5) Peron et Leseur. Tableau des Meduses, 1S09, p. 337- 



(6) Leseur. Recueil des Planches des Meduses (inedites) Planche XL, 

 fig. 1,2. 



(7) Milne Edwards. Cuvier rdgne animal illustre Zoophytes. Planche 43. 

 Fig. 3. 



(8) L. Agassiz. Monograph of Acalephae. Contributions to the Natural 

 History of the U.S.A. Vol. IV., p. 360. 



(9) Eschscholtz. System der Acalephen, 1S29. Seite 119. 



(10) E. Haeckel. Das System der Medusen. Seite 215. 



