REPORT ON THE ECHINOIDEA—MORTENSEN ay 
tation 5159; Tawi Tawi group, Jolo Archipelago; Tinakta 
Island (N.) bearing N. 82° W., 1.4 miles distant (lat. 5°11’50” N., 
long. 119°54’00’’ E.) ; 18 meters; coral sand; February 21, 1908. One 
young specimen, not with certainty identifiable as to the species. 
Station 5108; China Sea, off southern Luzon; Corregidor Light 
bearing N. 39° E., 22.5 miles distant (lat. 14°05’05’’ N., long. 120°19’ 
45’’ EB.) ; 23 meters; coral bottom; January 15, 1908. Two specimens. 
DIADEMA SAVIGNYI Michelin 
Diadema savignyi Mortensen, The Danish Expedition to Siam 1899-1900, 
II. Echinoidea [Danske Selsk. Skr., ser. 7, vol. 1, No. 1], p. 16, pl. 3, figs. 
6, 8; pl. 4, fig. 87; pl. 5, figs. 7, 9, 24, 1904.—A. Agassiz and H. L. CiarxK, 
Hawaiian and other Pacific Echini, Salenidae, etc. p. 114, 1908—H. L. 
CrLarK, Catalogue of the recent sea-urchins in the British Museum, p. 43, 
1925. 
Localities —Station 5149; in the vicinity of Siasi; Sirun Island 
(W.) bearing N. 39° E., 2.4 miles distant (lat. 5°33’00’’ N., long. 
120°42’10’’ E.) ; 18 meters; coral and shells; February 18, 1908. One 
young specimen in poor condition. 
No label. Two specimens. 
Genus ECHINOTHRIX Peters 
ECHINOTHRIX CALAMARIS (Pallas) 
Echinothriz calamaris A. AGAssiz, Revision of the Echini, pt. 3 [Mem. Mus. 
Comp. Zool., vol. 3], p. 413, pl. 3a, figs. 1, 2, 1873—H. L. CiarK, Catalogue of 
the recent sea-urchins in the British Museum, p. 44, 1925. 
Localities—Station 5138; in the vicinity of Jolo (Sulu); Jolo 
Light bearing 8S. 19° E., 2.5 miles distant (lat. 6°06’00’” N., long. 
120°58’50’”’ E.); 37 meters; sand, shells, and coral; February 14, 
1908. One small specimen. 
Station 5142; in the vicinity of Jolo; Jolo Light bearing S. 50° W., 
3.9 miles distant (lat. 6°06’10’’ N., long 121°02’40’’ E.) ; 88 meters; 
coral sand and shells; February 15, 1908. One specimen. 
Station 5148; Jolo Archipelago, in the vicinity of Siasi; Sirun 
Island (N.) bearing S. 80° W., 3.8 miles distant (lat. 5°35’40”" N., 
long 120°47’30” E.) ; 31 meters; coral sand; February 16, 1908. One 
large specimen. 
Station 5149; in the vicinity of Siasi; Sirun Island (W.) bearing 
N. 39° E., 2.4 miles distant (lat. 5°33’00’’ N., long. 120°42’10”’ E.) ; 
18 meters; coral and shells; February 18, 1908. Three specimens, one 
of them large. 
Station 5159; Tawi Tawi group, Jolo Archipelago; Tinakta Island 
(N.) bearing N. 82° W., 1.4 miles distant (lat. 5°11’50’’ N., long. 
119°54’00” E.); 18 meters; coral sand; February 21, 1908. One 
small specimen. 
