8 MUSEUM, BEOOKLYN INSTITUTE OF AETS AND SCIENCES. 



and without an aboral projection. It is about two-thirds as long as the height 

 of the bell-cavity. The entoderm of the tentacle-bulbs and manubrium is 

 robin-egg blue, while the ocelli are deep brown, almost black. All other 

 parts are hyaline. This medusa is abundant in the Tongue of the Ocean in 

 June and July, and was found at Turks Islands in January. 



Hybocodon Porbesii, Mayer. 



Fig. 13, Plate II. 



Mayer, A. G., 1894 ; Bull. Mub. Comp. Zool. at Harvard Coll., Vol. XXV, p. 236, PI. 1, Fig. 1. 



Bell higher than a hemisphere. About 2 mm. high. Bell walls thin and 

 transparent. Three rudimentary and one well developed tentacle; the lat- 

 ter 2 mm. long with its distal end swollen, and studded thickly with nemato- 

 cysts. Velum rudimentary. Entoderm of manubrium bright yellow. That 

 of the distal end of the long tentacle yellow and red. Nassau Harbor, Baha 

 mas. Spring months. 



Dissonema turrida, Mater. 



Fig. 10, Plate II. 



Mayeh, a. G.. 1900 ; Bull. Mus. Comp. Zool. at Harvard Coll., Vol. XXXVII, p. 44, PI. 2, Figs. 

 3, 4. 



Bell pyriform, 4 mm. high, with a hollow apical projection. Two large, hol- 

 low, tentacles, each about 12 mm. long. Fourteen short slender marginal cirri. 

 Sixteen ectodermal ocelli, one on the outer side of the base of each tentacle 

 and cirrus. Manubrium urn-shaped, with four crenulated lips, which project 

 beyond the velar opening. Four broad radial canals with four large sac-like 

 gonads on their proximal halves. Ova large and prominent. Entoderm of 

 manubrium and tentacles delicate green. Gonads and vascular canals deli- 

 cate pink. Ocelli red. Common throughout summer at Bahamas, and off 

 Florida coast. 



Halitiara formosa, Fewkes. 



Fig 8, Plate I. 



Fewkes, J. "W., 1882; Bull. Mub. Comp. Zool. at Harvard Coll., Vol. IX. p. 278, PI. 4 

 Fig. 2. 



Bell pyriform, 3 mm. high, with solid apical projection. Four long 

 radially situated tentacles, and 24-35 short tentacles with tapering bases. 

 No ocelli. Velum well developed. Four straight narrow radial tubes. Manu- 



