16 MUSEUM, BROOKLYN IJ^STITUTE OF ARTS AND SCIENCES. 
slightly recurved lips. Entoderm of manubrium, gonads and tentacle-bulbs 
usually green. Common off Bahamas, Florida, and Carolina coasts in winter 
and spring. Rare after mid summer. 
Obelia sp. 
Figs. 10-20. Plate III. 
Agassiz, a., 1888 ; Bull. Mus. Comp. Zool. at Harvard Coll., Vol. IX., p. 149. 
Mayer, A. G., 1900 ; Ibid., Vol. XXXVII., p. 52. 
Bell flat and disk-like. About 3 mm. in diameter. About 100 stiff ten- 
tacles, eacli one-quarter as long as tlie bell diameter. Eight otocysts at the 
bases of eight of the tentacles, two in each quadrant. Four gonads large and 
distended. AVhen mature they lie near the middle of the radial canals. En- 
toderm of manubrium and tentacle-bulbs milky in color. Bell transparent. 
Common at the Bahamas, rare at Tortugas, Florida. Hydroid unknown. 
Eucheilota paradoxica, Mayer. 
Figs. 17-18, Plate III; Fig. 65, Plate VII. 
Mater A. G., 1900 ; Bull. Mus. Comp. Zool. at Harvard Coll., Vol. XXXVII., p 56, Fig. 134- 
136, PI. 40. 
Mature Medusa: Bell about 4 mm. in diameter, and more than a hemis- 
phere, with a slight apical projection. Four large radially situated tentacles 
each flanked by two short coiled cirri. The basal-bulbs of these tentacles are 
large and hollow. There are also four interradial rudimentary tentacle-bulbs, 
each flanked by a pair of cirri. Eight otocysts, two in each quadrant, each oto- 
cyst bearing a single otolith. Four straight slender radial canals in the 
middle of each of which the gonads are situated. Manubrium, small and 
flask-shaped, with four simple lips. Color of entoderm of manubrium, gonads 
and tentacle-bulbs dull milky green. In the young medusa, the gonads are 
adjacent to the manubrium, but they finally migrate down the radial canals 
so as to come to lie upon the middle of each canal. Medusa buds arise from 
these gonads. When set free each medusa has four well developed radially 
situated tentacles as in the adult, but the interradial tentacle-bulbs lack 
lateral cirri. A number of the budding medusa' were killed in Flemming's 
fluid and sectioned, and it appears that both entoderm and ectoderm of the 
gonad of the parent take part in the formation of the bud which is thus 
formed, as are the medusa buds of the Sarsiada' or those of (he hydroids (Fig. 
