Plate 48. 



Fig. 1. Olindias tenuis, mature medusa. Nassau Harbor, Bahamas, July 

 16, 1903. 



Figs. 2 to 4. Olindias tenuis. Successive stages in the development of the 

 adhesive pads on the aboral sides of the exumbrella tentacles in 

 medusae, the diameter of whose bells are 2 mm., 8 mm., and 16 

 mm. respectively. 



Fig. 5. Olindias tenuis, side view of a part of one of the marginal tentacles 

 showing the half rings of nematocysts upon the exumbrella 

 (aboral) side, and the strand of longitudinal muscles on the 

 inner (velar) side of the tentacle. 



Fig. 6. Olindias tenuis. The extremity of one of the long marginal ten- 

 tacles showing the pad-like mass of adhesive cells and the knobbed 

 end of the tentacle. 



Fig. 7. Olindias tenuis. View of one of the gonads. 



Drawn from life, by the author. 



