Mateb. — Tortug.is Medusse. 



PLATE 30. 



Fig. 101. Abyla pentagona, Eschscholtz. 



Fig. 101». " " Usual form of the phyllocyst. 



Fig. 102. " " Enlarged view of the siphosome. (as) small "re- 



serve " swimming-bell ; («\s) bract, or covering scale; ((/) duct of the 

 large posterior swimming-bell ; {fjs) medusiform gonophore. 



Fig. 103. Abyla pentagona. Tentacular nematocyst battery. 



Fig. 104. Aglaisma cuboides, Chun. The monogastric, sexual generation of Abyla 

 pentagona. (cs) bract, or covering scale ; {gs) medusiform gonophore 

 that functions also as a swimming-bell. 



