180 



MR. E. T. BROWNE — BISCAYAN PLANKTON 



MedusjE occurred in the following hauls, but the genera could not be recognized owing 

 to the bad condition of the specimens. 



B. Medusa-bud. 

 Ec. Ectoderm. 

 En. Endoderm. 

 E.f. Ex-umbrella. 

 Mes. Mesogloea. 

 0. Opening into 



EXPLANATION OF PLATE 13. 



Reference letters. 



Ot. Otoporpa. 



stomach-pouch where a 



medusa-bud has been removed. 



P. Peronium. 

 Sp. Stomach-pouch. 

 Spc. Cavity of stomach-pouch. 

 Sub. Sub-umbrella. 

 T. Base of tentacle. 



Cunoctantha fowleri, sp. n. 



Fig. 1. Oral side of the medusa drawn to show the pouches of the stomach with medusa-buds in various 



stages of development. Semi-diagrammatic. X 20. 

 Fig. 2. Transverse section of a pouch of the stomach (drawn with the aid of a camera lucida), showing 



two very early medusa-beds. The bud E" is just beginning to develop, and bud jB' is at a 



little later stage. x 120. 



