BAHAMA MEDUS.E. 10 



GENERA AND SPECIES. 

 Gonionemus. 



Gonionemus, Aoassiz, A., 1862. 

 Gonynema, Haeckel, 1879. 

 Gonionema Perkins, 1902. 



Generic characters: With an adhesive disk near the distal extremity of 

 each and all of the tentacles. Tentacles all similar each to each, and pro- 

 jecting in a zone from the sides of the bell, above the margin, tlieir eutoderm- 

 al cores traversing the gelatinous substance of the bell. Four gonads, rib- 

 bon-lilce aud deflected alternately to one side and the other of the radial 

 canals. No blindly-ending centripetal canals. Numerous otocysts upon the 

 liell-margin. 

 Species : 



G. verteiis, Gulf of Georgia, State of Washington : Alaska. 



A. Agassiz, 1865; North Amer. Acal., p. 12S ; Mukbach aud Shearek, Proc. 



Zool. Soc, London, 1903, Vol. II., p. 183. 

 G. Murbachii, Wood's Holl, Massachusetts. 



Mdrbach, 1895; Joiirn. Morphol., XI., 2. 



Perkins. 1903: Proc. Acad. Nat. Sci.. Philadelphia, 1902, p. 750-790, 5 Plates. 

 G. suvaensis, Suva Harbor, Fiji Islands. 



Agassiz and Mater, 1899 ; Bull Mus. Com. Zool., XXXII., 9. 

 G. Agassizii, Unalaska, Aleutian Islands. 



Mdrbach, 1902 ; Annal. Mag. Nat. Hist., Ser. 7. IX., p. 73. 



Mfrbach and Shearer, 1903; Proc. Zool. Soc, London, p. 185, Pis. XXI., 



XXII. 

 G. depressum, Yokohama, Japan. 



Goto, S., 1903; Mark Anniversary Volume, p. 12, Pis. II., HI. 



Cubaia. 



Cubaia, Mayer, 1894. 

 Gonionemoides, Mayer. 1900. 



Generic characters: Tentacles are of two distinct kinds. Those of one set 

 are provided with adhesive pads, as in Gonionemus, and jtroject from a zone 

 slightly above the bell-margin, their entodermal axes traversing the gelati- 

 nous substance of tlie bell. The other tentacles arise from tlie bell-margin, 

 and are provided with terminal clusters of nematocysts but not with adhe- 

 sive pads. The gonads are papilliform. There are no centripetal canals. 

 There are numerous otocysts upon the bell-margin projecting freely into the 

 water. 

 Species : 



C. aphrodite, West Indies, Bahamas, Tortugas. 



Mater, 1894; Bull. Mus. Comp. Zool. XXV., p. 337. 



Il)id (Gonionemus aphrodite) XXXVIL, p. 62. 

 C. geophila, (Gonionemoides geophila) ; Bahamas. Florida. 



Mater, 1900; Bull. Mus. Comp. Zool. XXXVIL, p. 62. Immature medusa. 



" Ireniopsis primordialis," Bull. Mus, Comp. Zool., 1894 ; XXV., p. 238. 



