is, i Light: Philippine Scyphomedusan Jellyfishes 31 
Chrysaora are immature or stunted forms of species of Dactylo- 
metra. 
I have seen many specimens of this Dactylometra, the small 
white jellyfish which is extremely common in the bay at certain 
seasons of the year, particularly from June to November, but 
none of them have exhibited the 40 tentacles of the mature 
Dactylometra. One large specimen, collected by Doctor Shaw 
in June, 1920, shows the marginal lappets near the sense organ 
in each octant weakly divided, making the 6X8 marginal lap- 
pets characteristic of Dactylometra and confirming my diagnosis 
of this form as a species of Dactylometra. 
This is the dangerous jellyfish of Manila Bay. Its sting is 
at all times most unpleasant and often extremely dangerous. 
Among the symptoms caused by its sting are excruciating pains 
across the back ; general pains spreading from the region of the 
sting ; in some cases a paralysis, also spreading from the region of 
the sting, in others intense cramps and, in severe cases, a watery 
discharge from the throat accompanied by a dry hacking cough 
and strong mental depression, which is so strong at times as to 
cause a desire to commit suicide. A friend visiting in Cavite 
tells me that this form is very numerous there at the present 
time (June, 1920), and is the cause of numerous very severe 
stings. In the case of a bather who dived head foremost into a 
medusa and was severely stung about the head the pain was so 
intense and mental symptoms were so serious, I am told, as to 
require the administration of morphine on several occasions. 
This all goes to prove my contention 1 that the cases of poisoning 
reported by Old (1908) were due to this Dactylometra rather 
than to Lobonema as Doctor Smith believed (Mayer, 1910), 
particularly since the symptoms reported in cases of poisoning 
by Dactylometra agree with those reported by Old. 
Family ULMARIDA3 Haeckel, 1880, sensu Mayer, 1910 
Subfamily AURELIN^E L. Agassiz, 1862 
Genus AURELLIA Peron and Lesueur, 1809 
Aurellia labiata Chamisso and Eysenhardt, 1820. 
Aurellia labiata Chamisso and Eysenhardt, Nova Acta Phys. Med. 
Leop. Car. 10 (1820) 358, pi. 28 figs. 1 A. B.; Mayer, Medusae 
of the World 3 (1910) 628, fig. 398; Light, Philip. Joum. Sci. § D 
9 (1914) 200; Mayer, Pub. Carnegie Inst. Washington 212 (1915) 
182. 
1 Philip. Journ. Sci. § B 9 (1914) 295. 
