180 Papers from the Department of Marine Biology. 
Genus DACTYLOMETRA L. Agassiz, 1862. 
Dactylometra, Acassiz, L., 1862, Contributions to Nat. Hist. U. S., vol. 4, p. 166. 
GENERIC CHARACTERS. 
Pelagide with 8 rhopalia. 5X8 tentacles and 6X8 marginal lappets. 
Dactylometra africana Vanhoffen. 
Dactylometra africana, VANHOFFEN, 1902, Wissen. Ergeb. deutsch. Tiefsee Expedition, Dampfer 
Valdivia, Bd. 3, Lief. 1, p. 40, Taf. 4, Fig. 20. 
Disk 100 to 130 mm. wide with exumbrella thickly covered with wart-like 
clusters of nettling cells. 6 well-developed marginal lappets and 5 long 
tentacles in each octant. Lappets and tentacles red. Red radial streaks 
over exumbrella. (£sophagus, palps, and gonads not highly colored. Colors of 
large specimens duller and more brownish than those of small meduse and 
not unlike the coloration of D. quinquecirrha. Distinguished by its lappets 
being deeply pigmented near the margin on the exumbrella side. 
Vanhoffen’s specimens came from the Great Fish Bay, coast of German 
Southwest Africa, in October 1898. Five specimens, all imperfect, the largest 
about 105 mm. in diameter and with only 3X8 tentacles and 4X8 marginal 
lappets, were found by the Albatross at Station D 5461, June 14, 1909, at a 
depth of 12 fathoms, about 7.2 miles off Corregidor Light, Manila Bay, Luzon. 
The bells are pinkish in hue, and thickly and uniformly besprinkled over the 
exumbrella with red-brown nematocyst warts. The lappets are edged on the 
exumbrella side with reddish brown. The tentacles have been lost and the 
mouth parts are imperfect. 
Another specimen, 166 mm. in diameter and with mouth-arms 280 mm. long, 
was found at Kowloon, China, on August 14, 1908. It has 3X8 tentacles, 
and 6X 8 marginal lappets, the lappets being edged on their exumbrella margins 
with russet brown. 
Light (1914, Philippine Journal of Science, vol. 9, p. 198) records a Dacty- 
lometra from the Philippines which he believes is identical with D. quinque- 
cirrha. The bell is white, translucent, and covered on the exumbrella with 
minute white spots. 
Light’s specimens were all in the Chrysaora stage with 24 tentacles and 32 
marginal lappets. The sting which this medusa inflicts is far more severe 
than that given by the Dactylometra of our American coast. 
Genus SANDERIA Goette, 1886. 
Sanderia, Gorrts, 1886, Sitzungsber. Akad. Wissen. Berlin, Jahrg. 1886, p. 835.—VANHGOFFEN, 
1902, Wissen. Ergeb. deutsch. Tiefsee Expedition, Dampfer Valdivia, Bd. 3, Lief. 1, p. 37. 
GENERIC CHARACTERS. 
Pelagide with 16 marginal sense-organs, 16 tentacles, and 32 cleft marginal 
lappets. 4 lips, 4 interradial gonads, and 32 peripheral stomach-pouches in 
the radii of the tentacles and sense-organs. No marginal ring-canal. 
Sanderia malayensis Goette. 
Sanderia malayensis, GOETTE, 1886, Sitzungsber. Akad. Wissen. Berlin, Jahrg., 1886, p. 835.— 
VANHOFFEN, 1902, Wissen. Ergeb. deutsch. Tiefsee Expedition, Dampfer Valdivia, Bd. 3 
Lief. 1, p. 38, Taf. 3, Fig. 12; Taf. 8, Fign. 69-74.—Mayesr, 1910, Meduse of the World, 
vol. 3, p. 590. 
Found in the Indian Ocean, Gulf of Aden, at Singapore, and off the east 
coast of Africa. Some specimens of this medusa were found by the U.S. 
Fisheries Bureau steamer Albatross in the Philippine Islands between March 
and June 1908. 
