REPORT ON THE ECHINOIDEA—MORTENSEN 33 
120°45’26’’ E.); 622 meters; fine sand; January 20, 1908. One 
specimen. 
Station 5115; Verde Island passage; Sombrero Island bearing N. 
49° K., 7.3 miles distant (lat. 18°37’11’’ N., long. 120°48’40’ E.) ; 
622 meters; January 20, 1908. Two specimens. 
Station 5284; China Sea, in the vicinity of southern Luzon; Mala- 
vatuan Island (S.) bearing N. 46° W., 14.25 miles distant (lat. 
13°42’05’’ N., long. 120°30’45’’ E.) ; 771 meters; bottom temperature 
5.72° C.; gray mud and globigerinae; July 20, 1908. Three 
specimens. 
Station 5467; off the east coast of Luzon; Atulayan Island (S.) 
bearing §. 79° W., 2.5 miles distant (lat. 13°35’27’” N., long. 
123°37'18’’ E.); 877 meters; gray mud; June 18, 1909. Six 
specimens. 
Station 5586; Sibuko Bay, Borneo; Sipadan Island (M.) bearing 
W., 9.4 miles distant (lat. 4°06’50’’ N., long. 118°47’20’’ E.); 634 
meters; bottom temperature 6.67° C.; gray mud; September 28, 1909. 
One young specimen. | 
Station 5656; Gulf of Boni, Celebes; Olang Point bearing N. 67° 
W., 14.5 miles distant (lat. 3°17’40” S., long. 120°36’45’”’ E.); 871 
meters; gray mud; December 19, 1909. Three specimens. 
Remarks.—All these specimens are in rather poor condition, more 
or less broken, this species being very delicate and fragile, much 
more so than the other species, M. tuberculata. Only a very few of 
the club-shaped oral primary spines, or of the umbrella-shaped tube- 
feet, are preserved, though enough to show that they are found in 
this species exactly as in W/. tuberculata, which de Meijere could not 
determine in his single specimen. 
Recently this species has been taken by the John Murray Expedi- 
tion off the east African coast, which shows that the species is not 
confined to the Malay region, but must be distributed also all over 
the tropical part of the Indian Ocean. 
Family DIADEMATIDAE 
Genus ASTROPYGA Gray 
ASTROPYGA RADIATA (Leske) 
Astropyga radiata A. AGaAssiz, Revision of the Hehini, pt. 1 [Mem. Mus. Comp. 
Zool., vol. 3], p. 94, 1872; pt. 3, p. 420, 1873.—DO6DERLEIN, Jenaische Denkschr., 
vol. 8, p. 699, pl. 59, figs. 6, 7, 1902—MortreNsgen, The Danish Expedition to 
Siam 1899-1900, II. Echinoidea [Danske Selsk. Skr., ser. 7, vol. 1, No. 1], p. 18, 
pl. 3, figs. 15, 19; pl. 4, figs. 9,17; pl. 5, fig. 27, 1904. 
Locality —Sirinao Island (SW.), Nakoda Bay, Palawan; Decem- 
ber 30, 1908. Three large specimens. 
