584 



MEDUSAE OF THE WORLD. 



Mature medusa. Bell hemispherical, smaller than in D. quinquecirrha being about 

 70 mm. in diameter. Clefts in lappets adjacent to sense-organs fully as deep as those between 

 the remaining lappets instead of being mere shallow notches, as in D. quinquecirrha. The 

 tertiary tentacles arise from clefts between the lappets, not from the floor of the subumbrella, 

 as in D. quinquecirrha. The 8 primary tentacles are about 3 times as long as the bell-diameter. 

 The 16 secondary tentacles, however, are only about half, and the 16 tertiary, one-quarter 

 as long as the primary ones. 



General color dull milky-white, exumbrella sprinkled over with ocher-yellow-colored 

 spots, thickly clustered at aboral pole. Genital organs slightly yellowish, a delicate irides- 

 cence over the long, flexible mouth-arms. 



FIG 369. Daetylemetra lactea, aboral view, three-fourths natural size. From nature, 

 by the author. Showing variable character of the lobes and tentacles. 



In Havana 



This species is found at Rio Janeiro, Brazil, and at Jamaica and Cuba. 

 Harbor it is abundant and mature in February. 



A mature specimen found by me off Port Royal, Kingston 

 Harbor, Jamaica, on March 20, 1909, was of the following 

 dimensions in millimeters: Bell 66 wide, somewhat flatter 

 than a hemisphere, palps 50, longest tentacles 60 long. Exum- 

 brella regularly and thickly besprinkled with very small, low- 

 lying, milky-yellow colored netthng-warts. 16 spoke-like stripes 

 of dull ocher color and numerous russet-brown nematocyst-warts 

 at the margin of the exumbrella. Gelatinous substance and ten- 

 tacles milky. Gonads dull milky-pink. This specimen was very 

 irregular in the development of its tentacles and lobes, the 8 

 octants being as shown in the table (fig. 369). 



