BAHAMA MEDUSA. 9 



brium pyriform. Mouth a simple round opening; no prominent lips. Ento- 

 derm of manubrium and tentacle bases green in females, light brown in 

 males. 



Common at Tortugas; rare in Bahamas. An identical, or very closely 

 allied, form found in the Fiji Islands. 



Stomotoca australis, Mayek. 

 Fig. 9, Plate I. 



Mater, A. O.. 1900; Bull. Mus. Comp. Zool. at Harvard Ooll., Vol. XXXVII, p. 32, PI. 1, 

 Fig. 2. 



Bell 2.5 mm. high, with solid conical, apical projection, bell-walls thin. 

 Two large diametrically opposed tentacles at bases of two of the radial canals. 

 Two rudimentary tentacle-bulbs at bases of the other two radial canals. Eight 

 ectodermal ocelli, four on outer sides of the tentacle bulbs and four in inter- 

 mediate positions 45° from tentacle bulbs. Tentacle bulbs hollow. Velum well 

 developed. Radial canals broad and smooth-edged. Manubrium urn-shaped 

 with four prominent lips. Gonads in complexly folded radially situated 

 regions at upper part of sides of manubrium. Manubrium and tentacle-bulbs 

 greenish yellow, ectodermal core of manubrium and ocelli orange. Common 

 at Tortugas, Florida; not so abundant at the Bahamas. 



Tiara superba, Matbr. 



Fig. 11, Plate II. 



Matbb, a. a., 1900; Bull. Mus. Comp. Zobl. at Harvard Coll., Vol. XXXVII, p. 34. PI. 16, 

 Pig. 39. 



Bell 5 mm. high; pyriform with short apical projection, and thin walls. 

 Four long, hollow, tapering, and twelve rudimentary tentacles; each with 

 bright red ectodermal ocellus on outer side of tentacle-bulbs. Radial and 

 circular vessels broad and smooth-edged. Velum well developed. Manu- 

 brium urn-shaped, about two-thirds as long as the height of the bell-cavity, 

 with complexly fluted lips. Four gonads in radially situated folded regions 

 on the proximal parts of the manubrium. Four radial mesenteries bind the 

 manubrium to the walls of the radial canals. Entoderm of manubrium and 

 tentacles rose-pink. Core of the manubrium emerald-green. Gelatinous sub- 

 stance of bell delicate pink. Common at Tortugas, Florida; found occasion- 

 ally at Bahamas, Andros Island, Tongue of the Ocean, Nassau Harbor in 

 June and July. 



