REPORT ON THE ECHINOIDEA—MORTENSEN 49 
Pandanon Island; March 23, 1909. One specimen. 
San Pascual, Burias Island; tide pool; March 8, 1909. One young 
specimen. 
Atulayan Island; littoral; June 18, 1909. Ten specimens. 
Tomahu Island; tide pool; December 12, 1909. One specimen. 
Family ECHINOMETRIDAE 
Genus PARASALENIA A, Agassiz 
PARASALENIA GRATIOSA A. Agassiz 
Parasalenia gratiosa A. AGASSIZ, Revision of the Echini, pt. 8 [Mem. Mus. Comp. 
Zool., vol. 3], p. 435, pl. 3d, figs. 1, 2; pl. 6, fig. 14, 1873.—Morrensen, The 
Danish Expedition to Siam 1899-1900, II. Echinoidea [Danske Selsk. Skr., 
ser. 7, vol. 1, No. i], p. 121, pl. 5, fig. 36, 1904.—H. L. Crarx, Hawaiian and 
other Pacific Echini, Pedinidae, etc., p. 369, 1912; Catalogue of the recent 
sea-urchins in the British Museum, p. 141, 1925. 
Localities —Station 5109; China Sea, off southern Luzon; Cor- 
regidor Light bearing N. 42° E., 25.8 miles distant (lat. 14°03745’” N., 
long. 120°16’30’" E.); 18 meters; coral; January 15, 1908. One 
specimen. 
Station 5159; Tawi Tawi group, Jol6 (Sulu) Archipelago; Tinakta 
Island (N.) bearing N. 82° W., 1.4 miles distant (lat. 5°11’50’ N., 
long. 119°54’00”" E.) ; 19 meters; coral sand; February 21, 1908. One 
specimen. 
Apra Bay, Guam; November 19, 1907. Four specimens. 
Tataan, Simulac Island; February 19, 1908. One specimen. 
Remarks.—The specimen from station 5159, although an adult 24 
mm. long, has the genital plates almost naked; only a small tubercle 
is found at the inner edge of genitals 2 and 3. Also in the largest 
specimen from Guam, 17 mm. long, the genital plates are entirely 
naked. Accordingly the presence or absence of tubercles on the genital 
plates gives no reliable distinction between P. gratiosa and P. pohlii, as 
H. L. Clark thinks, using this character in his key to the species of 
Parasalenia. 
Parasite —On the specimen from station 5159 was found a specimen 
of the interesting epizoic ophiuran Ophiosphaera, carrying, as usual, 
the pygmy male individual across its mouth. As usual, the female 
had its back toward the test of the sea-urchin.? 
PARASALENIA POHLII Pfeffer 
Parasalenia pohtii H. L. Crark, Hawaiian and other Pacific Echini, Pedinidae, 
ete., p. 369, pl. 95, figs. 1-5, 1912. 
Parasalenia poehli H. L. CuarK, Catalogue of the recent sea-urchins in the 
British Museum, p. 142, 1925. 
7 Cf. Mortensen, Vid. Medd. Dansk Naturh. Foren., vol. 93, p. 183, 1933. 
