﻿220 The Philippine Journal of Science im 



the ring canal is completely interrupted in the ocular radii and 

 thinned in the interocular, while that portion lying outside the 

 ring canal is thinned in the ocular radii and only slightly so 

 in the interocular radii. 



The arm disk is two-thirds as wide as the bell radius, very 

 thin in the center, and swollen and rounded along the outer 

 edge. The subgenital ostia are compressed, are twice as wide 

 as the interostial pillars, and have a small papillalike projec- 

 tion in the center of their subumbrellar lip. The subgenital 

 porticus is unitary. The gonads are in the form of long lines 

 in the thin reduplicated and folded wall of the stomach. On 

 each side of these lines of reproductive organs are lines of blunt 

 gastral filaments. These reduplicated membranes are inflated 

 and pushed out through the subgenital ostia in the two specimens 

 in the collection. Each of the interostial pillars contains a 

 slitlike false ostium about two-thirds as wide as the pillar. One 

 specimen examined had a large cone-shaped papilla on the upper 

 margin of this false ostium, while others did not. 



The supporting membranes of the 3 main branches of the 

 mouth arms are pierced by windowlike openings. Typically, 

 there seem to be 2 in the membrane of each wing, but the 

 weakened arm membranes have broken down in most of the 

 arms. In no arm are there more than 2 in each wing, in 

 some none at all, and in others the branch is only attached 

 by its upper edge, the membrane between the openings having 

 given away. The mouth arms are equally spaced, the two 

 arms arising from the same interostial pillar being widely 

 separated, the base of each extending partly over the adjacent 

 subgenital ostium. The proximal portion of each arm is about 

 one-half the length of the 3-winged distal portion. The fringed 

 mouths extend on the inner surface to the center of the arm 

 disk. Scattered among the mouths are very numerous filaments. 

 Those of the central disk and the proximal portion of the arms 

 are slender, threadlike filaments. Toward the distal portion 

 they increase in length and become spindle-shaped, circular in 

 cross section, and tapering to a long threadlike portion. The 

 larger filaments contain an axial canal, and reach a maximum 

 length of 200 mm. and a diameter of 10 mm. 



In life, the medusa has an exquisite color scheme of purple, 

 violet, and rose pink. The gonads are, as a rule, pink, the 

 general color is violet, and the fringe of tentaclelike marginal 

 lappets purple. These colors vary considerably in intensity 

 and arrangement. In formalian, the entire medusa is milky gray 

 and the gonads and mouth fringes are yellow. 



