MAYEK: medusa from the TORTUGAS, FLORIDA. 53 



situated tentacles, which are hardly more than mere tentacle bulbs. There 

 are 8 otocysts, 2 in each quadrant. Each otocyst contains a single spherical 

 otolith. The velum is well developed. There are 4 straight, narrow, radial 

 canals, and a slender circular vessel. The proboscis is very small, and is a 

 mere tube, cruciform in cross-section and provided with 4 simple lips. The 

 gonads occupy 4 linear swollen regions near the mid-regions of the 4 radial 

 canals. The entoderm of the tentacle bulbs, gonads, and proboscis is of a 

 decided bro^vn color. This medusa was quite common at the Tortugas, 

 Florida, late in June, 1899. 



The very small proboscis and marginal tentacles as well as the remarkable 

 swollen condition of the gonads in this medusa foreshadow the condition of 

 Agastra mira (Hartlaub, 1897 ; Wissen. Meeresuntersuch. Biol. Anstalt Hel- 

 goland, Neue Folge, Bd. II. p. 504, Taf. XII. Fig. 10), where there is no trace 

 either of proboscis or tentacles. 



PSEUDOCLYTIA, nov. gen. 

 Pseudoclytia pentata, nov. sp. 



Figs. 24-26, Plate 13; Figs. 35, 35*. Plate 15: Figs. 131, 132, Plate 39. 



Generic Characters. — Pseudoclytia. Eucopidee with numerous simple ten- 

 tacles (20 in this species). Otocysts alternating with the equally numerous 

 tentacles. 5 simple radial canals, 72° apart. 5 gonads situated upon the 5 

 radial canals. The proboscis lacks a peduncle and is provided with 5 simple 

 lips. 



Specific Characters. — Adult medusa. The bell is flatter than a hemisphere 

 and is 8-13 mm. in diameter. There are 20 simple tentacles with well-de- 

 veloped basal bulbs. Each of these tentacles is a little less than half as long 

 as the bell height. There are no lateral or marginal cirri. There are 20 

 otocysts which alternate in position with the 20 tentacles. Each otocyst con- 

 tains a single spherical otolith (Figure 26). The velum is well developed. 

 There are 5 straight, narrow, radial canals 72° apart. The 5 gonads are situ- 

 ated upon the radial canals at points midway between the proboscis and 

 the bell margin (Figures 35, 131). In the female the ova are large and 

 prominent, and when immature are seen to have a well-defined nucleus and 

 nucleolus (Figures 35% 131). The proboscis is flask-shaped and there are 5 

 simple recurved lips. The entoderm of the proboscis, gonads, and tentacle 

 bulbs is usually slightly milky in color, with a few scattered cinnamon-colored 

 granules. Occasionally an individual is met with in which these cinnamon- 

 colored granules are developed to such an extent that the medusa displays a 

 brick-red color (Figure 35). In most individuals, however, the colored gran- 

 ules are so faint as to be almost imperceptible. In some individuals there is a 

 more or less decided green spot in the entoderm of each tentacle bulb (Fig- 

 ures 131, 132). 



