﻿206 The Philippine Journal of Science 1914 



This very interesting and distinctly new Cassiopea is rep- 

 resented by a single specimen collected by Dr. L. E. Griffin 

 and Mr. L. D. Wharton in Culion Bay, where it was found 

 with C. polypoides var. culionensis. It is most nearly related 

 to C. polypoides and C. xamachana, but it is differentiated from 

 them as from all other species by the numerous very large ap- 

 pendages, by its very large size, and by the combination in one 

 medusa of the following characteristics : 7 lappets to a paramere, 

 mouth arms longer than the bell radius, and an unpigmented 

 sense organ. 



Owing to the extreme fragility of the specimen, it is impossible 

 to make as complete a description as might be desired. 



RHIZOSTOMATA DICHOTOMA Vanhoffen 

 Genus CEPHEA Peron and Lesueur, 1809 

 Cephea cephea (Forskal) Mayer. 



I have a single worn specimen of this widely distributed 

 species collected at Mariveles, Manila Bay, in January, 1912. 

 It is undoubtedly a form of Cephea cephea as shown by the 

 deep clefts of the sense organs and the high, heavily warted 

 central dome. The bell diameter is 220 mm., and the distance 

 from the lower surface of the arm disk to the top of the dome 

 is 120 mm. The 8 mouth arms arise in 4 pairs. Each arm is 

 shorter than the bell radius, and shows decided lateral compres- 

 sion in the proximal portion. The two outer branches are 

 considerably stouter than the inner branches. The mouths are 

 borne only on the faces of the main branches and their sub- 

 branches. Scattered among the mouth arms are numerous short, 

 ribbonlike, narrow appendages which when contracted have a 

 berrylike appearance. These reach a maximum length of 40 

 mm., most of them being from 10 to 20 mm. in length. There 

 is a very conspicuous set of folded ridges containing the radial 

 muscles and extending from the arm disk to the ring canal, 

 which is about 50 mm. from the margin. On these ridges are 

 numerous very small, flexible, cone-shaped projections. The 

 circular muscles which are also distinct folds lying between the 

 ring canal and the margin are interrupted, partially at least, in 

 the rhopalar radii. The canal system agrees with that given by 

 Mayer for Cephea cephea, except that the ocular canals are 

 considerably wider, in their distal portion at least, than are 

 the interocular canals. The subgenital ostia are small, half- 

 moon shaped, convex below, and concave above. 



The central dome of the exumbrella is 80 mm. high and 



