is, i Light: Philippine Scyphomedusan Jellyfishes 29 
Pasay beach. One mutilated specimen was collected by Gregorio 
Ylarde some years ago. A magnificent specimen was collected from 
the bay by Mr. Hilario A. Roxas, of the department of zoology, 
December 19, 1920, near Paranaque, with the assistance of Paulino 
Aguilar. 
7. Cotylorhizoides (gen. nov.) paeificus (Mayer) 1915. 
Cotylorhiza pacifica Mayer, Pub. Carnegie Inst. Washington 212 
(1915) 185-187. 
Reported by Mayer from a single mutilated specimen collected by 
the Albatross at the launch landing, Manila Bay. Common in Manila 
Bay at irregular intervals. Specimens collected by Shaw and my- 
self at Pasay beach, May, 1918, and at other times. 
8. Catostylus purpuras Mayer. 
The commonest jellyfish of Manila Bay and its tidal creeks (esteros). 
Reported by Mayer (1910 and 1915) and Light (1914). 
9. Mastigias papua L. Agassiz. 
An occasional visitor to Manila Bay. Reported from the bay for 
the first time in this paper. 
10. Lobonema mayeri Light. 
Very common during the summer months. Perhaps to be considered 
the same as the next species. Reported by Light (1914). 
11. Lobonema smithii Mayer. 
Reported by Mayer (1910) from a single mutilated specimen. 
Perhaps the same as the preceding species. 
12. Thysanostoma thysanura Haeckel. 
Reported here for the first time from Manila Bay from two perfect 
specimens collected by Doctor Shaw at Pasay beach, one in the summer 
of 1919 and the other in July, 1920. 
In the following pages I shall consider these species in order 
placing them systematically and giving such notes concerning 
habits, morphology, classification, etc., as have accumulated since 
my paper of 1914. No attempt is made to give complete synon- 
ymies. References are to the original descriptions, change to 
present form of name, and to reports from Manila Bay. 
Order CARYBDEIDiE Gegenbauer, 1856 
Genus CARYBDEA Peron and Lesueur, 1809 
Carybdea alata var. grandis Agassiz and Mayer. 
Charybdea grandis A. Agassiz and Mayer, Mem. Mus. Comp. Zool. 
Harvard College 26 (1902) 153, pi. 6, figs. 26-31. 
Carybdea alata var. grandis Mayer, Medusae of the World 3 (1910) 
511, fig. 329; Pub. Carnegie Inst. Washington 212 (1915) 171. 
Mayer (1915) reports two specimens of this variety collected 
by the Albatross, at Station 5361, Manila Bay, February 9, 1909, 
in 12 fathoms. This is the only record of this form and I have 
never encountered it. It is the only record of any species of the 
family Carybdeidse from Manila Bay and their presence was 
