32 The Philippine Journal of Science 1921 
No specimen of this species has been recorded from Manila 
Bay since my former paper (1914). 
Order RHIZOSTOMLE Cuvier, 1799 
Rhizostomata diehotoma Vanhoffen, 1888 
Genus CEPHEA Peron and Lesueur, 1809 
Cephea cephea (Forskal, 1775) sensu Mayer, 1910. 
Medusa cephea Forskal, Descrip. Anim. Itin. Orient. (1775) 108, 
No. 22, Icon., tab. 30 (non tabl. 29). 
Cephea cephea Mayer, Medusae of the World 3 (1910) 654, 655; 
Light, Philip. Journ. Sci. § D 9 (1914) 206; Mayer, Pub. Car- 
negie Inst. Washington 212 (1915) 185. 
This species has not been recorded from Manila Bay since 
1914. It is probably only a chance visitor to Manila Bay. 
Genus ANOMALORHIZA novum 
Generic diagnosis. — Rhizostomata diehotoma, the bifurcation 
of whose mouth arms is confined to a small distal region. A 
terminal, club-shaped appendage containing a continuation of the 
mouth-arm canal is found arising from the inner surface of 
each mouth arm at the point of bifurcation. Small, very slender, 
threadlike filaments are scattered among the mouth arms. The 
8 sense organs have small exumbrellar sensory pits, and distinct 
Fig. 1. A sense organ of Anomalorhiza shawi gen. et sp. nov. as seen from the subumbrellar 
side showing the subumbrellar shelf. X 6. 
subumbrellar shelves (see fig. 1). A distinct ring canal anasto- 
mosing externally with a canal system extending to the margin 
and internally with 16 radial canals, the 8 rhopalar canals 
extending to the sense organ, the 8 interocular canals not being 
