30 
The Philippine Journal of Science 
1921 
probably due to chance currents as they are typically found along 
more exposed shores. 
Order SEIVLEOSTOM^ L. Agassiz, 1862 
Family PELAGID.4: Gegenbauer, 1856 
Genus DACTYLOMETKA L. Agassiz, 1862 
Dactylometra africana Vanhoffen, 1902. 
Dactylometra africana Vanhoffen, Wissen. Ergeb. deutsch. Tiefsee 
Expedition, Dampfer Valdivia, Bd. 3, Lfg. 1 (1902) 40, taf. 4, fig. 
20; Mayer, Pub. Carnegie Inst. Washington 212 (1915) 180. 
“Lappets and tentacles red. Red radial streaks over exum- 
brella. * * * Distinguished by its lappets being deeply pig- 
mented near the margin on the exumbrella side.” (Mayer, 1915.) 
I have seen no specimen of this species, which Mayer reported 
(1915) from five specimens captured by the Albatross in Manila 
Bay in 12 fathoms, 7.2 miles off Corregidor Light, Albatross 
station D5461. 
It is worthy of note that these specimens were in the Chrysaora 
stage; that is, with twenty-four sense organs and thirty -two 
tentacles, as are practically all of the specimens of Dactylometra 
quinquecirrha so common in Manila Bay. It is possible that 
these specimens and those studied by me and identified as D. 
quinquecirrha belong to the same species; either D. africana, 
although the distinguishing pigment is entirely lacking in the 
many specimens I have examined from Manila Bay, or D. quin- 
quecirrha. Or it may be that the two forms are simply variants 
of the same variable species. Whatever their systematic posi- 
tion no other specimens of this type have been reported from 
Manila Bay, and it is probable that they are very rare visitors 
there. 
Dactylometra quinquecirrha (Desor, 1848) L. Agassiz, 1862. 
Pelagia quinquecirrha E. Desor, Proc. Boston Soc. Nat. Hist. 3 (1848) 
p. 76. 
Dactylometra quinquecirrha L. Agassiz, Cont. Nat. Hist. U. S. 4 
(1862) 125, 166; Mayer, Medusae of the World 3 (1910) 585, pi. 
62-64a, figs. 371, 372; Light, Philip. Journ. Sci. § D 9 (1914) 198. 
While the species belonging to the genus Dactylometra are 
characterized by the presence of 5 X 8 tentacles and 6x8 lap- 
pets, the medusae pass through a Chrysaora stage in which they 
have the 3X8 tentacles and 4X8 marginal lappets character- 
istic of the genus Chrysaora Peron and Lesueur. Indeed it seems 
probable that some, if not all, of the forms referred to the genus 
