SCYPH0MEDU8AE COLLECTED BY STEAMER "ALBATEOSS." 231 



(3 and 4.) Resemble Chrysaora melanaster, but there are 40 tentacles. 



3. Marginal lobes not highly colored Dactylometra quinquecirrha. 1 



4. Marginal lobes red Dactylometra africana. 



5. Resembles Dactylometra (3) in general appearance, but the color is more 



yellowish, and there are only 16 tentacles. Bell about 4 inches wide. 

 Thirty-two cleft marginal lobes Sanderia malayensis. 



6. Bell only about \ inch wide, translucent, 24 tentacles, 32 marginal lobes, 8 



simple radial canals, alternating with 8 complexly branching canals on the 



concave side of the bell Discomedusa philippina. 



7 and 8. Bell genatinous, about 10 inches wide or larger, hyaline or slightly 

 milky, with 4 whitish or pinkish horseshoe-shaped genital organs near the 

 center of the bell. 4 long, fleshy lips. More than 100 short tentacles. 

 8 simple and many branched and anastomosing canals all of which are 

 conspicuous, due to their milky color. 



7. 8 clefts in the bell-margin Aurellia aurita. 



8. 16 clefts in the bell-margin Aurellia laoiata. 



Family RHIZOSTOMAE. 



Usually large medusae without marginal tentacles. With numer- 

 ous minute mouths, the frilled tentacle-bearing lips which super- 

 ficially resemble sea weed. Mouths born on 8 more or less branched 

 projections (mouth-arms) arising from the center of the concave 

 side of the bell. Common in harbors in the East Indies. The gelatin- 

 ous substance of the bell is often remarkably rigid. The branched, 

 frilled, and tentacle-bearing mouth-arms are often greenish or red- 

 dish in color, thus giving the appearance of some sort of vegetable 

 growth arising from the center of the concavity of the bell. 



Living on the bottom, slowly pulsating, " lying on its back," with 

 the concave side of the bell, and its 8 mouth-arms, and mouths upper- 

 most; remaining for hours, or days, fixed at one place and rarely 

 swimming through the water Cassiopea. 



1. Bell flat, about 4 inches wide, without a concavity where it lies upon the 



ground. Olive-brown in color with about 18-22 triangular large whitish 

 spots in the radii of the marginal sense organs. 3 small white streaks near 

 the bell margin between the large triangular spots. 8 bifurcated mouth- 

 arms Cassiopea andromeda, var. oaduensis. 



2. Bell olive green about 6 inches wide with a suckerlike concavity where it 



touches the ground. Dull inconspicuous, white bands radiate outward in 

 the radii of the 16 or more marginal sense organs. The leaflike append- 

 ages of the mouth-arms are opaque white. 



Cassiopea polypoides, var. culionenus. 1 



3. Bell about 11 inches wide. Numerous large ribbonlike appendages on the 



mouth-arms, 4£ inches long Cassiopea medusa.' 



Large free swimming medusae a foot or more wide with a more or 

 less conspicuous dome covered with wart-like projections at the center 



1 See S. F. Light, 1914, Philippine Journal of Science, vol. 9, section D, p. 198. 



2 Idem, p. 201. 



3 Idem, p. 204. 



