Plate 34. 



Figs. 1 and 1'. Phialidium gelattnosum, male. Figure l', one of the 



marginal lithocysts. Tortugas, Florida, June 14, 1897. 

 Fig. 2. Phialidium mccradyi, producing a generation of medusa-buds within 



the hydroid blastostyles upon its gonads. Nassau Harbor, 



Bahamas, July, 1903. Drawing uncolored. 

 Fig. 3. Phialidium mccradyi. Side view of the medusa, Tortugas, Florida. 

 Fig. 4. Phialidium globulosum. Tortugas, Florida, June 16, 1897. 

 Fig. 5. Phialidium languidum (southern form), mature female. Tortugas, 



Florida. 



Drawn from life, by the author. 



