112 GERYONOPSID^. 



Family GERYONOPSIDiE Agass. 



Geryonopsidce Agass. Cont. Nat. Hist. U. S., IV. p. 362. 1862. 

 GeryonidcE EscH. (p. p.). Syst. der Acal., p. 86. 1829. 



EIRENE EscH. 



Eirene EscH. Syst. der Acal., p. 94. 1829. 

 Geryonopsis Forbes. Naked-eyed Medusae, p. 39. 1848. 

 Phortis McCr. Gymn. Charl. Harb., p. 90. 

 Eirene Agass. Cont. Nat. Hist. U. S., IV. p. 362. 1862. 



Eirene gibbosa Agass. 



Eirene gibbosa Agass. Cont. Nat. Hist. U. S., IV. p. 362. 1862. 

 Phortis gibbosa McCr. Gymn. Charl. Harb., p. 91. 



Charleston Harbor (McCrady). 



Eirene coerulea Agass. 



Eirene coerulea Agass. Cont. Nat. Hist. U. S., IV. p. 362. 1862. 



The spherosome increases rapidly in thickness from the circular tube 

 to the peduncle, which tapers quickly, and when fully expanded does 

 not reach much beyond the level of the veil (Fig. 163) ; the ovaries 

 are linear, slightly convoluted, do not extend the whole length of the 

 Fig. 163. chymiferous tubes, but begin about half- 



way up, between the circular tube and 

 the base of the peduncle, extending close 

 to the digestive sac, which is terminated 

 by four short lips with slightly fimbriated 

 edges ; the outline of the spherosome is 

 hemispherical ; the tentacles are numer- 

 ous, in the largest specimens measuring 

 an inch and a quarter across the disk, 

 and an inch in height ; there were as many as thirty to thirty-five 

 short tentacles between every two chymiferous tubes ; the gelatinous 

 disk has a slight tinge of blue. Found at Key West and the Tortugas 

 in April. 



Florida, Key West (L. Agassiz). 



Fig. 163. Eirene coerulea. 



