SEMAEOSTOME^ — DACTYLOMETRA, KURAGEA. 



589 



lappets are the smallest, and only about half as wide as the others. The i6 radial stomach- 

 pouches of nearly similar torm and size. Mouth-arms lonj^er than bell-radius and tapering 

 to pointed tips. Bell white with reddish-brown star on exumbrella. Inner sides of mouth- 

 arms and tentacles brown. Found on the coast of Japan in autumn. This form is imper- 

 fectly separated from D. quinquecirrha of which it appears to be a variety, if, indeed, it be not 

 identical with the American medusa. 



"Dactylometra longicirra" Kishinouye. 



Daclylometra quinquecirrha var. pacijica, Goette, 1886, Sitzungsber. Akad. Wissen. Berlin, Jahrgang 1886, p. 834. 

 Dactylomftra longicirra, Kishinouve, 1892, Zoological Magazine, Tokyo, vol. 4, p. 261, taf. 2. 



Bell flatly rounded, 3 times as wide as high and 75 mm. in diameter. 48 tongue-shaped 

 marginal lappets, all smiilar each to each, somewhat narrower near their bases than near 

 their outer ends. Accessory lappets sometimes seen on sides of ocular lappets. 40 tentacles 

 of nearly equal length each to each, and io times as long as bell-diameter; these tentacles 

 are wide, flat, and ribbon-like near their bases; sometimes one finds small accessory tentacles 

 arising from between the ocular lobes and their accessory lateral lappets or from the sub- 

 umbrella surface of the ocular lappets. The medusa then has 56 tentacles, 7 in each octant 

 as in Kuragea depressa ot Japan, and this illustrates the close genetic relationship which 

 exists between the two forms. In the middle the ocular stomach-pouches are twice as wide 

 and in their distal parts half as wide as the tentacular pouches. The mouth-curtains are 

 very wide and much folded; they are about 5 times as long as bell-diameter. 



Bell white with 32 reddish-yellow radiating streaks. Mouth-arms yellow. Gonads and 

 tentacles reddish. 



Found on the Pacific coast of Japan, in Owari Bay. Its common Japanese name is 

 Aschinaga Kurage, or Akakurage. I am inclined to believe that this is only a growth-stage of 

 Kuragea depressa, and that it is identical with D. ferrugmaster. 



Genus KURAGEA Kishinouye, 1902. 



Kuragea, Kishinouye, 1902, Journ. College Sci. Tokyo, vol. 17, art. 7, p. 9, plate 1, fig. 7. 



The type species is K. depressa of Japan. 



GENERIC CHARACTERS. 



Pelagidae with 8 marginal sense-organs. 8X7 (56) tentacles. 8x8 (64) marginal lobes. 

 4 interradial gonads. 



This genus bears the same relation to Dactylometra that the latter does to Chrysaora, 

 being a stage wherein the lappets and tentacles have progressively increased by 16 in number. 



Thus Chrysaora has 24 tentacles and 32 lappets, Dactylometra has 40 tentacles and 48 

 lappets, Kuragea has 56 tentacles and 64 lappets. I am inclined to look upon this form as an 

 hypertrophic Dictylometra rather than as a separate genus. 



Kuragea depressa Kishinouye. 

 Kuragea depressa, Kishinouye, 1902, Journ. College Sci. Tokyo, vol. 17, art. 7, p. 9, plate i, fig. 7. 



Umbrella 85 mm. wide and 30 mm. high. 8 marginal sense-organs. 8X7 (56) tentacles. 



8x8 (64) marginal lobes. 4 gonads, each folded 

 in the form of the Greek letter <«. Gastric 

 filaments long and numerous. Color ( ?) Misaki, 

 Japan. A single specimen. 



The 16 ocular lobes and the lobes by the 

 sides of the adradial tentacles are larger than 

 the others, while those adjacent to the ocular 

 lobes are the smallest. The lips are broad and 

 complexly folded. The exumbrella exhibits a 

 i6-rayed, star-shaped marking in the inter-radii, 

 adradii, and perradii. The central stomach gives 

 I, „ . t i-- u- II rise to 16 peripheral pouches as in Doir/y/omc/ra 



riG. 374. — Kuragea depressa, alter Kishinouye, m Journal . . ' r ■ 1 j. r 1 • i 1 10 



College of Sci., Tokyo University. longicirra. In the middle of their lengths the 5 



