8 :\irSEUM. F.ROOKLYX IXSTITUTK OF ARTS AND SCIENCES. 



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

 of the hell-cavity. The entoderm of the tentaole-bulbs and manubrium is 

 robin-egg blui', while the ooelli are deep brown, almost black. All other 

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

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



Hybocodon Forbesii, Mayku. 



Fxj. Li. Plate 11. 

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



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 nmnubrium bright yellow. That 

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

 mas. Spring months. 



Dissonema turrida, Mayek. 



Fig. 10, Plate II. 



Mayer. A. G., 1900 ; Hull. Mur. Conip. Zool! at Harvard Coll., Vol. XXXVII, p. 44, PI. 2, Kigs. 

 3, 4. 



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

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

 Sixteen octodermal 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 (heir proximal luilves. Ova large and prominent. Entoderm of 

 manubrium and tentacles delicate green, (ionads and vascular canals deli- 

 cate pink. Ocelli ird. Common throughout summer at Baliama.s, and ofif 

 Florida coast. 



Halitiara formosa, Fewkes. 



Fig S. Plate I. 



Fk-wkbs, J. W., 1882; Bull. Mus. Comp. Zool. at Harvard Coll., Vol. IX. p. 27«, PI. 4 

 Fig. 2. 



Bell pyriform, 8 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 strniglit narrow radial tubes. ,Manu- 



