MAYER : MEDUSA FROM THE TORTUGAS, FLORIDA. 



75 



Polygastric 

 Generation 



< DIPHYOPSIS, Haeckel, 1888. 

 X ERS^A, EscHscHOLTz, 1829. 



Diphyopsis campanulifera, Chdn. 



Figs. 93-95, Plate 28. 



' Diphyes , Quoy, J. R. C, and Gaimard, P., 1827, Ann. des Sci. 



Nat., Tom. 10, PI. I. Fig. 7. 



Diphyes campanulifera, Eschscholtz, F., 1829, Syst. der Acaleplien, 

 p. 137. 



Diphyes Bory, Quoy, J. R. C., and Gaimard, P., 1833, Voyage de 

 I'Astrolabe, Tom. IV. Zoophytes, p. 83, PI. IV. Figs. 1-6. 



Diphyopsis campanulifera, Chun, C, 1888, Sitzungsber. Akad. 

 Wissen. Zoul., Bd. XLIV. p. 1159. 



Diphyopsis compressa, Haeckel, E., 1888, Siphonophorje., Challen- 

 ger Report, Zoul., Vol. XXVIII. p. 153, Plates 33, 34, 18 Figs. 



Free Sexual 

 Generation 



Erssea Lessonii, Chun. 



Figs. 96, 97, Plate 38. 



f Ersaea Gaimardi, Eschscholtz, F., 1829, Syst. der Acalephen, p. 



128, Taf. XII. Fig. 4. 

 Eudoxia Lessonii, Huxley, T. H., 1859, Oceanic Hydrozoa, p. 57, 



PI. III. Fig. 6. 

 Ersaea compressa, Haeckel, E., 1888, Siphonophorae, Challenger 



Report, ZoGL, Vol. XXVIII. p. 123, PI. XXXIV. Figs. 9-18. 



This Siphonophore is common all over the Tropical and Subtropical Atlantic. 

 A few individuals are drifted into Newport Harbor every summer by the 

 southerly winds, and are probably blown northward from the waters of the 

 Gulf Stream. 



Polygastric 

 Generation 



Diphyopsis picta. 



C Doraniasia picta, Chun, C, 1888, Sitzungsber. Akad. Wissen. 

 Berlin, Bd. XLIV. p. 1154. 

 Doraniasia picta, Chun, C, 1892, Abhandl. Senckenberg Gesell , 

 Bd. XVIII. p. 91, Taf. VIII. Fig. 3 ; Taf. IX. Figs. 6-9. 



Free Sexual 

 Generation 



Erssea picta, Chun. 



Fig. 118, Plate 34. 



Ersffia picta, Chun, C., 1888, Sitzungsber. Akad. Wissen. Berlin, 

 Bd. XLIV. p. 1154. 



This form has been found by Chun in the Canary Islands, and it is also 

 common at the Tortugas, Florida. We present a figure of the free sexual 

 generation. 



VOL. XXXVII. — NO. 2. 6 



