Mayek. — Tortugas Medusrfi. 



PLATE 42. 



Fig. 140. Eucopium parvigastnim, nov. sp. Adult medusa. 



Fig. 141. Niobia dendrotentacula, nov. gen. et sp. Side view of an adult medusa. 



Fig. 142. Niobia dendrotentacula. A young medusa recently separated from the 



adult individual. 

 Fig. 143. Niobia dendrotentacula. The proboscis and ova of a mature medusa 



after the cessation of the medusa-forming process. 



