BAHAMA MEDrS.T^. 



33 



PLATE VI. 



Fig. 53. Olindias tenuis. 

 " 54. " " 



55-5'; 



58. 



58a. 



59. 



Fig. 60. 

 " 61. 



63. 

 63. 



" G4. 

 " 65. 



Mature iiiL'du.sa. 



Side view of bell-margin, showing that the 

 short tentacles arise from the sides of the 

 bell above the margin, while the long flex- 

 ible tentacles arise from the bell-margin. 

 The short tentacles have each a sucker-like, 

 nematocyst-pad upon the aboral side of 

 their distal ends; while the long flexible 

 tentacles have numerous half-rings on 

 their inner, and a well developed strand 

 of longitudinal muscle fibres upon their 

 outer sides. 



Successive stages in the development of the 

 sucker-like nematocyst-pad upon the 

 aboral side of the short tentacles in 

 medusa? the diameter of whose bells are 

 respectively 2 mm., 8 ram. and 16 ram. 



Side view of a portion of one of the long 

 tentacles showing the half-rings of nema- 

 tocysts on the inner and the strand of 

 longitudinal muscle fibres on the outer 

 side. 



Extremity of one of tlie long flexible ten- 

 tacles showing the terminal knob of 

 neniatocysts, and the pad-like thickening 

 upon the outer side of the tentacle, com- 

 posed of closely crowded elongate nema- 

 tocyst cells. 



View of one of the gonads. 



PLATE 



"Tatnoya punctata," Fewkes. 

 Tamoya haploncma, F. Miiller. 



VII. 



Side view, natural size. S|)ecimen from 



Cireat Peconic Bay, Long Island, New 



York. 

 " " View of canals in the velarium. 



" " The sensory club seen from the centripetal 



side. 

 " " The sensory club seen from the side, showing 



ectodermal eyes, and entodermal otolith. 

 Section througli. the gonad of Showing that the entoderm and ectoderm 

 Euchciluta piinidoxica. of the bud are derived directly from the 



same layers of the gonad. ect, ectoderm ; 



entj entoderm, b, gonad of the budding 



medusa. 



