SCYPHOMEDUS.E OF THE AUSTRALIAN SEAS. 25 



Umbrella slightly vaulted, hat-shaped or semi-spherical, 2 3 times as broad 

 as high. Umbrella margin with 48 marginal flaps. In every octant four 

 large pointed velar flaps, and two small ocular flaps. Mouth-arms about as 

 long as the umbrella radius, with simple zigzag-shaped suction crisp. 



Size. Diameter of umbrella, 40 mm. ; height, 20 mm. 

 Locality. Bass Straits, Smith. 



ARCHIKHIZA AUROSA. E. HAECKEL. 

 Arcliirlci.a aurosa, E. Haeckel. Das System cler Medusen. Seite, 645. 



Archirhiza aurosa, R. v. Lendenfeld. The Scyphomedusaj of New South 

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

 volume ix., part 2, page 582. 



Umbrella flat, disc-shaped, margin, with 80 flaps, in every octant 8 oval 

 pointed velar flaps between two broad triangular ocular flaps ; mouth-arms 

 one and a-half times as long as the umbrella radius, conic, simple, with simple 

 suction crisp. 



8ic. Breadth of umbrella, 50 mm. ; height, 20 mm. 

 Locality. New Zealand, Weber. 



Genus HAPLORHIZA. Haeckel, 1879. 



The mouth-arms do not coalesce with their lateral walls, and are unbranched. 

 Sub-genital pouch continuous, dividing the brachial disc completely from the 

 umbrella. 



HOPLORIIIZA PUXCTATA. E. Haeckel. 

 Iloplorliiza punctata. E. Haeckel. Das System cler Medusen. Seite G04. 



Hoplorhiza punctata. Pt. v. Lendenfeld. The Scyphomedusre of the Southern 

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

 volume ix, part 2, page 294. 



Umbrella slightly vaulted with 176 marginal flaps (in each octant 10 pairs 

 of narrow, round velar flaps, between 2 small recurved ocular flaps), 8 

 arms quite simple, cylindrical, half as long as the radius of the umbrella. Sub- 

 genital ostia three times as broad as the pillars. 



Colour. Ex-umbrella dark violet-brown, equally speckled with white 



spots. 



Size. Breadth of umbrella, 40 mm. ; height of umbrella, 20 mm. 



Ontogenesis. Unknown. 



Locality. Coast of North Australia, Arnheim's Land, J. M. Elsc-y. 



