52 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 
ECHINOMETRA OBLONGA (de Blainville) 
Echinometra oblonga H, L. CLark, Hawaiian and other Pacific Echini, Pedinidae, 
ete., p. 373, pl. 114, figs. 1, 2, 1912; Catalogue of the recent sea-urchins 
in the British Museum, p. 144, 1925. 
Localities—Port Binanga, Subig Bay, Luzon; January 9, 1908. 
Five specimens. 
Nasug Bay, Luzon; reef; January 16,1908. Three specimens. 
Balayan Bay; January 18, 1908. One specimen. 
Papatag Island, Tawi Tawi; February 23, 1908. One specimen. 
Port Palapag; June 3, 1909. One specimen. 
Batan Island; July 22, 1909. Six specimens. 
Genus HETEROCENTROTUS Brandt 
HETEROCENTROTUS MAMMILLATUS (Linnaeus) 
Heiterocentrotus mammillatus H. L. CLarK, Hawaiian and other Pacific Echini, 
Pedinidae, ete., p. 3878, pls. 115-117, 1912; Catalogue of the recent sea-urchins 
in the British Museum, p. 147, 1925. 
Localities —Tataan, Simulac Island; February 19, 1908. One 
specimen. 
Mahinog, Camiguin Island; August 3, 1909. Three specimens. 
Tidore Island; November 25, 1909. One specimen. 
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