﻿ix. d. 3 Light: Some Philippine Scyphomedusx 207 



about 70 mm. in diameter. It is covered at the bottom with 

 small granular warts. Toward the top, these increase in size, 

 reaching at the apex a length of 18 mm. and a diameter of 

 14 mm. They are irregular, and may be slender and pointed 

 or irregular and massive. 



The margin is not in a good state of preservation, but there 

 are evidently 8 sense organs, which lie in deep notches, and 

 about 80 marginal lappets — 8 velar and 2 ocular between each 

 two sense organs. The lappets show very plainly as thicken- 

 ings of the gelatinous material, but are not distinct at the edge 

 where they are joined by a web. The dome is transparent rosy 

 pink, shading to light blue at the apex. 



RHIZOSTOMATA TRIPTERA Vanhoffen sensu Maas 

 Genus CATOSTYLTJS L. Agassiz, 1862 

 Catostylus purpurus Mayer. 



The disk is somewhat flatter than a hemisphere in preserved 

 specimens, but more convex than a hemisphere in life. The ex- 

 umbrella is smooth. The 8 rhopalia are flanked by short, nar- 

 row, bluntly rounded lappets. In each octant there are 4 cleft 

 and 2 simple velar lappets ; in all, 10 velar terminal lappets to an 

 octant. In the whole bell there are 96 marginal lappets, 16 

 rhopalar, and 80 velar terminal lappets. In any octant the velar 

 lappets are arranged as follows: One cleft lappet, 1 simple lap- 

 pet, 2 cleft lappets, 1 simple lappet, and 1 cleft lappet. 



The arm disk at the base is about half as wide as the bell 

 diameter, and is much smaller at the level of origin of the 

 mouth arms. The long, narrow genital ostia are nearly as 

 wide as the interostial pillars. They are constricted by a thick, 

 wide median projection which extends from the arm disk. A 

 long finger-shaped or swollen papilla is seen on the subumbrellar 

 surface. It arises on the outer margin of the ostia in the 

 line of the rhopalar canal. The subgenital porticus is unitary 

 and cruciform. 



The mouth arms are from 0.75 to 1.25 as long as the bell 

 radius, and the mouths extend to the extreme tip of each arm. 

 In living specimens, particularly those that are immature, a 

 considerable part of the mouth arms is covered by edges of the 

 bell. In preserved specimens the bell is flattened and the edges 

 are turned in, leaving the mouth arms exposed. 



The circular muscles extend uninterruptedly from the arm disk 

 to the margin, being most prominent between the circular canal 

 and the margin. 



