Mayer. — Western Atlantic Medusse. 



PLATE 6. 



Fig. 20. Octoneraa gelatinosa, nov. sp. 



Fig. 21. Octonema gelatinosa, nov. sp. Marginal sense club. 

 Fig. 22. Mnemiopsis McCradyi, nov. sp. View of broad side. Natural size. 

 Fig. 23. Mnemiopsis McCradyi, nov. sp. View of narrow side. Uncolored figure, 

 natural size. 



