622 



MEDUS.E OK THK WOKI.D. 



Krukenberg, 1880, finds that Jiiiillui niintii contains 95.34 per cent ot water and only 

 4.66 per cent of solid matter. 



The planula larva commonly develops into a scvphostoma which gives rise to a number 

 of ephyrae through strobilization. In aquaria, however, Haeckel, 1881, finds that the planula 

 mav develop directly into a single medusa without passing through the sc\phostoma-stage. 

 In this case the ocular lobes and tentacles grow outward around the gastrula mouth, and the 

 gelatinous substance of the planula becomes that of the medusa. In other cases the scypho- 

 stoma develops into a single medusa which remains attached by a pedicel formed of the basal 

 part of the scyphostoma, recalling the condition observed in the Stauromedus;e. 



Herouard, iqo" (Comptes Rendus, i'aris, tome 145, p. 601, IliiJ., 1908, tome 147, p. 1336), 

 finds a peculiar scyphostoma in an aquarium at Roscoff, which ma\- possibh be that of Aurel- 

 lia affected by adverse conditions of confinement, although he calls it TaeniolhyJra roscoj- 

 fftisis. It develops lateral buds, and in addition to these peculiar cysts on its pedal zone. 



Synopsis of the Races or Species of Aurellia — Continued. 



♦These are probably one and the same species and should be called Aurellia labiata 



