582 



MEDUS.E OF THE WORLD. 



this medusa. He gives good figures of it showing the considerable depth of the adradial clefts 

 between the lappets. 



Chrysaora helvola var. calliparea. 



(?) Cyanea calliparta, Revnaud, 1830, Lesson's Ccnturic Zoologiquc, p. 67, planchc 20. 

 Chrysaora callifarea, Haeckel, 1880, Syst. der Meduscn, p. 516. 



See synoptic table of forms of Chrysaora. 



This medusa is reported from Pondicher)- and Zanzibar, and our knowledge of it is still 

 imperfect. 



Chrysaora helvola var. chinensis. 



Chrysaora chinensis, VANHorFEN, 1888, Bibliotheca Zoologica, Heft. 3, p. 16. 



In the single specimen described by Vanhoffen the disk is 70 mm. wide and 30 nmi. high. 

 Exumbrella thickly covered with numerous, very small wans arranged in a scale-like manner 

 from summit to margin. Ocular and tentacular marginal lappets of equal width and length, 

 longer than wide, and each one ends in a blunt point; lappets overlap each other on their 

 sides and this causes the ocular lappets to appear smaller and sharper than the tentacular 

 lappets. The 16 radiating stomach-pouches are all of equal width at periphery of central 

 stomach. The septa bordering the 8 ocular pouches trend so as to become wider apart for 

 the proximal three-fourths of their lengths, so that the ocular pouches are about twice as wide 

 as the tentacular ones at this zone. The septa then trend toward the ocular radii so that at 



the bell-margin the 8 ocular stomach- 

 pouches are only half as wide as the 8 

 tentacular ones. The 4 lips, or palps, 

 are each 7 times as long as the radius 

 of the disk. Near the mouth-opening 

 they are almost as wide as bell-radius 

 and are curtain-like. Midrib of each 

 mouth-arm well developed, the folded 

 margins thin. Outer parts of palps 

 about one-third as wide as bell-radius, 

 not tapering outwards, but ending 

 bluntly. Color (?) Gonads (.?) Tenta- 

 cles (?) Found near Hongkong, China, 

 in October. 



This form is distinguished by its 

 peculiar exumbrella warts and its very 

 long mouth-arms. It is separated from 

 Chrysaora calliparea by its long, pointed, marginal lappets. 



Fig. T,bb.— Chrysaora /if /vo/a, according to Brandt, after Vanhoffen, 

 in Nordishes Plankton. 



Chrysaora melanaster Brandt. 



Chrysaora melanasler, Brandt, 1838, Mim. Acad. Sci. St. Paersbourg, Sci. Nat., sdr. 5, tome 4, p. 385, taf. 16, 17.— Haeckel, 

 1880, Syst. derMedusen, p. 515.— Fewkes, 1889, Bull. Essex. Inst. Salem, vol. 21, No. 7, p. 121.— Vanhofeen, E., 1906, 

 Nordisches Plankton, Nr. 11, p. 49, fig. 12. 



Melanasler mertensii, Agassiz, L., 1862, Cent. Nat. Hist. V. S., vol. 4, pp. 126, 166. 



Melanaster, sp., AcASSiz, A., 1865, North Amer. Acal., p. 50. 



See synoptic table of species of Chrysaora. 



This abundant North Pacific form is found from Hamtschatka to California. Bell 

 with reddish-brown radial lines extending from center to margin. Marginal sense-organs 

 bright yellow and brown. Tips of tentacles are red. When old it develops 48 lappets, but 

 the tentacles remain 32. 



It is closely allied to Dactylometra quinrjuecirrha of the North Atlantic, and C. gilbcrti 

 is one of its varieties. 



Chrysaora melanaster var. "gilberti" Kishinouye. 

 Chrysaora gilberti, KisMiNOVYE, 1899, Zool. Anieigcr, Bd. 22, p. 44, i fig. 



Distinguished by its semicircular lappets all similar each to each and its relatively long 

 tentacles. It is probably only a variety of C. melanaster. 



