SCYPHOMEDUS.E OF THE AUSTRALIAN SEAS. 21 



Colour. Umbrella and tentacles colourless. Entoclerm of the gastral 

 cavity brown ; mouth-arms white, with purple margin, or purple throughout. 

 Genital organs in the male rose-coloured, and in the female orange-yellow. 



Size. 70 500 mm. diameter of the umbrella ; length of tentacles, 300 mm. 



I. CYAXEA AXXASKALA VAR PURPEREA. 



A small variety not exceeding 150 200 mm. in diameter, with mouth-arms, 

 which are of a uniform purple colour throughout. 



Locality. Port Phillip, v. Lendenfeld. Abundant in January, February 



and March. 



II. CYAXEA AXXASKALA VAR MARGIXATA. 



A large variety, attaining a diameter of 400 mm. in the umbrella. The 

 mouth-arms are colourless, only on the margin there is an intensely purple 

 zone a few millimetres in width. 



Locality. Port Jackson, v. Lendenfeld. From November to March. 



Familia AURELID^. 



Glaus, 1883. 



Lemostornse with narrow canals which are joined by a ring-canal, with very 

 small ephyra-flaps (ocular flaps), with numerous short hollow tentacles, which 

 arise from the dorsal side of the umbrella on the 8 intermediate flaps in the 

 tertiary radii. With cavities (schirmhahlen) for the sexual organs. 



Genus AURELIA. Peron et Lesueur, 1809. 

 Mouth-arms simple. 



AURELIA CLAUSA. Lesson. 



Aurelia clausa, Pv. Lesson. Voyage de la Coquille. Zool., p. 119. 

 Aurelia clausa, E. Haeckel. Das system der Medusen. Seite 558. 

 Aurelia clausa, L. Agassiz. Monograph. Contributions to the Natural 

 History of the United States of America ; vol. iv., page 1GO. 



Claustra y>issiml>oguc, Pi. Lesson. Acalephes, page 78. 



Ocyroe lineolata, Peron et Lesueur. Tableaux des Meduses, page 355. 



Cassio})ea lineolata, T. de Lamarck. Systeme des Animaux sans vertebres. 



Tome ii, page 511. 

 Aurelia clausa, R. v. Lendenfeld. The Scyphomedusse of the Southern 



Hemisphere. Proceedings of the Linnean Society of New South Wales ; 



volume ix, part 2, p. 279. 



Umbrella semi-spherical, twice as broad as high, 16 velar flaps of the 

 umbrella margin protruding. Mouth-arms narrow, thin and curled, they 

 coalesce at the base, with a large oval pointed lip-like thickening. The four 

 labial thickenings can close (T) the entrance to the sub-genital pouches. 



