Plate 54. 



Figs. 1 to 3. Solmundella mediterranea. Figure I, oral view of the medusa; 

 figure 2, sensory-club; figure 3, optical section of a portion of 

 the length of a tentacle. A side-view of this medusa is shown 

 in figure 4, plate 55. 



Fig. 4. Cunoctantha kollikeri. A budding stolon-larva found floating at 

 Tortugas, Florida, July, 1904. (See page 464.) 



Figs. 5 to 8. Cunoctantha kollikeri (?) Successive stages in the development 

 of the medusa-buds on the stolon-larva shown in figure 4. 



Fig. 9. Cunoctantha kollikeri(}) Sensory-club of the medusa-bud shown in 

 figure 8. 



Fig. 10. Geryonia proboscidalis, with contracted manubrium. Drawing 

 twice the natural size. Nassau Harbor, Bahamas, April, 1907. 

 (See page 425.) 



Figs. 11 to 11"'. JEgina rhodina. Tongue of the Ocean, north of Nassau, 

 Bahamas, April 21, 1907. Figure 11', one of the marginal 

 sensory-clubs; figure 11", one of the tentacles; figure 11'", 

 optical section near the middle of the length of one of the ten- 

 tacles showing the abaxial ridge of nettling cells which extends 

 along the outer side of the tentacle. (See page 452.) 



Figure 11 drawn by Mr. Carl Kellner; other figures drawn from life, by 



the author. 



