32 Edward T. Browne. [No. 4 



Osterfjord. — 3 m. 24. 9. 1902. Four specimens. 

 An early stage of the adult form. Umbrella 10 mm. in dia- 

 meter. The marginal tentacles are beginning to develop. 

 Three specimens belong to the Ephyra-stage. One of them is 

 abnormal; it has nine tentaculocysts, three sets of gastrie filaments, 

 and its mouth is triangular. 



■ All these specimens either belong to the Ephyra-stage or have 

 just passed beyond it. The appearance of the Ephyra of Aurelia 

 aiirita in September is not in accordance with the breeding habits 

 of this medusa on the British coasts, where the Ephyra-stage always 

 occurs in the spring, generally about March to May. These t may 

 be a few stray specimens which have been liberated unusually late 

 from the Scyphistoma-stage. 



University College, London, April 1903. 



