Mayer. — TortiiRas Medusse. 



PLATE 10. 



Pig. 20. Oceania gelatinosa, nov. sp. 



Fig. 20". " " Otocyst. 



Fig. 21. Phortis pyramidalis = Eutinia pyramidalis, L. Agassiz. 



Fig. 21a. " " Portion of bell margin. 



