Mayer — Tortugas Medusae. 



PLATE 31. 



Fig. 105. Ocyroii crystallina, Rang. Figure 1| times the natural size, (w) wart- 

 like protuberances upon the surface of the Ctenophore ; (au) auricle. 

 Fig. 106. Agalma Pourtalesii, Agassiz and Mayer. Female gonads. 

 Fig. 107. " " Male gonad. 



