280 THE SCYPHOMEDUS.E OF THE SOUTHERN HEMISPHERE, 



Cassioprea lineolata? Lamarck, 1817. Systeme des Animaux 

 sans vertebres. Tome. II., p. 511. 



Umbrella semi-spherical, twice as broad as high. 1G 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 (?) the entrances to the sub-genital pouches. 



Golozcr : Ovaries, canals, and tentacles rose coloured. 



Size : Breadth of Umbrella, 80-100 mm. Height, 40-50 mm. 



Locality : South Pacific Ocean, Port Proslin, New Ireland. 

 Lesson. Australia (?) Peron. 



Aurelia coerulea. nov. sp. 



The Umbrella is very flat, about 5 times as broad as high, 

 with 16 small ocular and 16 velar flaps, divided from the 

 former by deep incisions, but from each other only by a shallow 

 groove. The mouth-arms are broad and a little longer than the 

 margin of the Umbrella. They are rounded at the end. The 

 centrifugal branches of the canal system, divide at larger angles 

 than in other species, so that the ramification has by no means a 

 slender appearance. There are very few amostomoses only. 



It differs from Aurelia aurita, Lamark, by its broader mouth- 

 arms, the margins of which are not curled, and by the stubby 

 appearance of the canal system. In these respects Aurelia 

 colpota, Brandt, resembles A. coerulea. The colour of our species 

 is similar to that of A. aurita, but fainter and always decidedly 

 blue. A. colpota also differs from our species in colour A. 

 flavidula, Peron et Leseur, possesses flaps at the base of the 

 mouth-arms, and has a yellow tinge. A. marginalis, L. Agassiz, 

 has much smaller mouth-arms. A. hyalina, Brandt, again 

 possesses lancet-shaped mouth-arms. A. labiata Chamisso et 

 Eysenhardt possesses 16 velar flaps like our species, but these are 

 divided from each other by deep incisions. In A. clausa, Lesson, 

 the mouth-arms are narrow and curled, and the colour is red. In 

 A. limbata, Brandt, there also are 16 very distinct velar-flaps, and 

 the tentacles are brown. 



