610 THE AUSTRALIAN HYDROMEDUS.E, 



211. ZYGOCANNULA DIPLOCONUS. Haeckel. 

 This sj)ecies was obtained in the Sundasee, and described by 

 Haeckel (1). 



212. ZYGOCANNULA UNDULOSA. Haeckel. 

 This species was obtained off Arnheiin's land, north coast of 

 Australia, and described by Pei'on et Leseur (2) as ^Equorea 

 undulosa. Leseur (3) mentions it as .^Equorea undulosa, Lesson 

 (4) describes it as Polyxenia undulosa and Haeckel (5) refers it 

 to the genus Zygocannula. 



57. GENUS ^EQUOREA. Peron et Leseur. 

 ^Equorida3, with numerous Radial Canals (16-32 or moi'e), 



which take their origin separately from the central stomach. 

 The latter broad and flat without (Esophagus-tube. Lateral 

 stomach wall rudimentary, very low. Mouth wide open. Margin 

 of mouth simple, without flaps or frils. 



213. ^QUOREA EURHODINA. Peron et Leseur. 

 This species was obtained from Bass' Straits, and described by 

 Peron et Leseur (6) is also mentioned by Leseur (7), L. Agassiz 

 (8) and Haeckel (9) under the same name. 



58. GENUS RHEGMATODES. A. Agassiz. 

 Aequorideo with numerous simple Radial Canals (16-32 or more.') 



These are simple and originate separately from the stomach. 

 Stomach small, funnel-shaped, reversed conic, constricted below. 

 Lateral wall of stomach high and richly folded. Mouth aperture, 

 small and narrow. Margin of mouth simple, smooth, or crispy, 

 without flaps or frils. 



Polyp colonies unknown. 



(1) E. Haeckel. Das System der Medusen. Seite 216. 



(2) Pdron et Leseur. Tableau des Meduses, 1809, p. 33S. 



(3) Leseur. Recueil des Planches (ineditesl, pi. XII., figs. 1-4. 



(4) Lesson. Acalephes, 1843, p. 314. 



(5) E. Haeckel. Das System der Medusen. Seite 217. 



(6) Pelrcm et Leseur. Tableau des Meduses, 1809, p. 336. 



(7) Leseur. Recueil de Planches des Meduses (inedites). Planche IX. 



(8) L. Agassiz. Monagraph of Acaleplue, Contribution to the Nat. 

 Hist, of the U.S.A., Vol. IV., p. 359. 



(9) E. Haeckel. Das System der Medusen. Seite 220. 





