Plate 55. 



Fig. 1. Cunoctantha octonaria, mature male. Charleston Harbor, South 

 Carolina, September 7, 1897. Lettering as in figure 2. 



Fig. 1'. Cunoctantha octonaria. A sensory-club of the medusa shown in 

 figure I. 



Fig. 2. Cunoctantha octonaria, young medusa removed from the manubrium 

 of Turritopsis nutricula McCrady, to which it was clinging. In 

 both figures I and 2, n n indicates the marginal nerve cord; o, 

 otoporpa; v, annular part of the velum; v , web-like part of the 

 velum between the lappets. Charleston Harbor, South Carolina, 

 September 10, 1897. 



Fig. 3. JEginura incisa. Tortugas, Florida, June 30, 1899. 



Fig. 4. Solmundella mediterranea, female. An oral view of this same medusa 

 is shown in figure 1, plate 54. Tortugas, Florida, May 27, 1906 



Drawn from life, by the author. 



