BAHAMA MEDUSAE. 19 
GENERA AND SPECIES. 
Gonionemus. 
Gonionemus, Agassiz, 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, their entoderm- 
al cores traversing the gelatinous substance of the bell. Four gonads, rib- 
bon-like and deflected alternately to one side and the other of the radial 
canals. No blindly-ending centripetal canals. Numerous otocysts upon the 
bell-margin. 
Species : 
G. verlens, Gulf of Georgia. State of Washington ; Alaska. 
A. Agassiz, 1865; North Amer. Acal., p. 12S ; Mubbach and Shearer, Proc. 
Zool. Soc, London. 1903, Vol. II., p. 183. 
G. Murbachii, Wood's Holl, Massachusetts. 
Mubbach, 1895 ; Journ. Morphol., XL. 2. 
Pebkins, 1903; Proc. Acad. Nat. Sci.. Philadelphia, 1902, p. 750-790, 5 Plates. 
G. .suvaensis, Suva Harbor, Fiji Islands. 
AGAS.SIZ and Mayee, 1899 ; Bull Mus. Com. Zool., XXXII. , 9. 
G. Agassizii, Unalaska, Aleutian Islands. 
Mubbach, 1903 ; Annal. Mag. Nat. Hist., Ser. 7, IX., p. 73. 
MuRBACH and Shearer, 1903; Proc. Zool. Soc, London, p. 185, Pis. XXL, 
XXII. 
G. depressum, Yokohama, Japan. 
Goto, S., 1903; Mark Anniversary Volume, p. 12, Pis. II., III. 
Cubaia. 
Cubaia, Mater, 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 project from a zone 
slightly above the bell-margin, their entodermal axes traversing the gelati- 
nous substance of the bell. The other tentacles arise from the 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 
w^ater. 
Species: 
C. aphrodite, West Indies, Bahamas, Tortugas. 
Mayer, 1894; Bull. Mus. Comp. Zool. XXV., p. 237. 
Ibid (Gonionemus aphrodite) XXXVII., p. 02. 
C. geophila, (Gonionemoides geophila) ; Bahamas, Florida. 
Mayer, 1900 ; Bull. Mus. Comp. Zool. XXXVIL, p. 62. Immature medusa. 
"Ireniopsis primordialis," Bull. Mus. Comp. Zool., 1894; XXV., p. 238. 
