REPORT ON THE ECHINOIDEA MORTENSEN 303 



The differences pointed out above between these specimens and 

 the typical form are so slight that I do not think it justifiable to des- 

 ignate them as a separate variety. 



Specimens of this species were taken by the author at the Kei 

 Islands (1922), it being thus evidently widely distributed over the 

 Malayan region. 



STEREOCIDARIS INDICA Doderlein 



Stereocidaris indica Doderlein, Zool. Anzeiger, vol. 23, 1901, p. 19. — de 

 Meijere, Die Echinoidea der Siboga-Exped., 1904, p. 18, pi. 1, fig. 1; 

 pi. 11, figs. 119, 120; pi. 12, fig. 121.— Doderlein, Wiss. Ergeb. d. Tiefsee- 

 Exped., vol. 5, Lief. 2, 1906, p. 104; pi. 10, figs. 1, 2; pi. 11, figs. 1-6; 

 pi. 12, figs. 3-10; pi. 36, figs. 5-9; pi. 37, figs. 2-7.— H. L. Clark, Bull. 

 Mus. Comp. Zool., vol. 51, No. 7, 1907, p. 218; Cat. Recent Sea-urchins 

 Brit. Mus., 1925, p. 26. 



Localities. — Station 5119; Verde Island Passage; Sombrero Island 

 bearing S. 80° E., 18.9 miles distant (lat. 13° 45' 05" N., long. 120° 30' 

 30" E.) ; 720 meters ; bottom temperature 6.50° C. ; green mud and sand ; 

 January 21, 1908 (4 specimens, Cat. Nos. E. 1321, E. 1322,U.S.N.M.). 



Station 5300; China Sea, in the vicinity of southern Luzon; (lat. 

 20° 31' 00" N., long. 115° 49' 00" E.) ; 484 meters; gray mud and 

 sand; August 8, 1908 (1 specimen, Cat. No. E. 1352, U.S.N.M.). 



Station 5348; Palawan passage; Point Tabonan bearing S. 89° E., 

 33.5 miles distant (lat. 10° 57' 45" N., long. 118° 38' 15" E.); 685 

 meters; bottom temperature 13.56° C; coral sand; December 27, 

 1908 (1 specimen, Cat. No. E. 1388, U.S.N.M.). 



Station 5445; east coast of Luzon; Atalaya Point, Batag Island, 

 bearing S. 64° E., 3.6 miles distant (lat. 12° 43' 05" N., long. 125° 

 01' 00" E.); 700 meters; bottom temperature 6.83° C; green mud 

 and sand; June 3, 1909 (1 specimen, Cat. No. E. 1323, U.S.N.M.). 



Station 5450; east coast of Luzon; East Point, Batan Island, bear- 

 ing S. 36° E., 9.2 miles distant (lat. 13° 23' 15" N., long. 124° 00' 

 30" E.); 745 meters; bottom temperature 5.72° C; green mud and 

 coral; June 4, 1909 (1 specimen, Cat. No. E. 1293, U.S.N.M.). 



Station 5591; Sibuko Bay, Borneo ; Mabul Island (NW.) bearing 

 N.6°W.,3.1 miles distant (lat. 4° ll'48"N.,long.ll8°38'20"E.);475 

 meters; September 29, 1909 (1 specimen, Cat. No. E. 1305,U.S.N.M.). 



Station 5592 ; in the vicinity of Sibuko Bay, Borneo ; Silungan 

 Island (M.) bearing N. 1° W., 6.4 miles distant (lat. 4° 12' 44" N., 

 long. 1 18° 27' 44" E.) ; 557 meters; bottom temperature 6.28° C. ; green 

 mud; September 29, 1909 (2 specimens, Cat. No. E. 1365, U.S. N.M.). 



Remarks. — The specimens correspond with the var. ajricana or 

 integra of Doderlein. They all have cylindrical primaries, without 

 any indication of elevated crests and without terminal broadening. 

 There are, however, a few minor differences. The test is more or 

 less sunken toward the peristome; the number of ambulacral plates 

 corresponding to an interambulacral plate at the ambitus is about 20 

 27566—27 5 



