REPORT ON THE ECHINOIDEA MORTEN SEN 



265 



Station 5423; Jolo (Sulu) Sea;Cagayan Island, Cagayanes Islands 

 (S.) bearing S. 11° E., 4.8 miles distant (lat. 9° 38' 30" N., long. 

 121° 11' 00" E.); 929 meters; bottom temperature 9.89° C; gray 

 mud and coral sand; March 31, 1909 (7 specimens, Cat. Nos. E. 1373, 

 E. 1379, U.S.N.M.). 



Station 5487; between Leyte and Mindanao; San Ricardo Point, 

 Panaon Island, bearing S. 50° E., 11.2 miles distant (lat. 10° 02' 45" 

 N., long. 125° 05' 33" E.) ; 1,338 meters; bottom temperature 

 11.28° C; green mud; July 31, 1909 (1 specimen, the type, Cat. No. 

 E. 1335, U.S.N.M.). 



Station 5488; between Leyte and Mindanao; San Ricardo Point, 

 Panaon Island, bearing S. 59° E., 9 miles distant (lat. 10° 00' 00" N., 

 long. 125° 06'45"E.); 1,411 meters; bottom temperature 11.28° C; 

 green mud; July 31, 1909 (4 specimens, Cat. No. E. 1344, U.S.N.M.). 



Station 5510; in the vicinity of northern Mindanao; Camp Over- 

 ton Light bearing S. 68° E., 9.1 miles distant (lat. 8° 16' 00" N., 

 long. 124° 03' 50" E.) ; 757 meters; bottom temperature 11.67° C; 

 gray mud and fine sand ; August 7, 1909 (1 specimen, Cat. No. 1386, 

 U.S.N.M.). 



Station 5511; in the vicinity of northern Mindanao; Camp Over- 

 ton Light bearing S. 80° E., 15.3 miles distant (lat. 8° 15' 20" N., 

 long. 123° 57' 00" N.); 749 meters; bottom temperature 11.67° C; 

 gray mud and sand; August 7, 1909 (5 specimens, Cat. No. E. 1346, 

 U.S.N.M.). 



Station 5512; in the vicinity of northern Mindanao; Camp Over- 

 ton Light bearing S. 76° E., 14 miles distant (lat. 8° 16' 02" N., long. 

 123° 58' 26" E.); 813 meters; bottom temperature 11.56° C; gray 

 mud and fine sand; August 7, 1909 (22 specimens, Cat. Nos. E. 1318, 

 E. 1372, U.S.N.M.). 



Station 5527; between Bohol and Siquijor; Balicasag Island (C.) 

 bearing N. 14° W., 8.2 miles distant (lat. 9° 22' 30" N., long. 1 23° 

 42' 40" E.); 716 meters; bottom temperature 11.83° C; globigerina 

 ooze; August 11, 1909 (6 specimens, Cat. No. E. 1345, U.S.N.M.)- 



Measurements 



Apical system 



12 mm. (54.5 per cent h. d.). 

 10 mm. (50 per cent h. d.)._ 

 10.5 mm. (53.8 per cent h.d.) 

 10 mm. (55.5 per cent h. d.)_ 

 9 mm. (53 per cent h. d.">... 

 6 mm. (50 per cent h. d.'*... 



Peristome 



9 mm. (41 per cent h. d.1. 

 8 mm. (40 per cent h. d.). 

 8 mm. (41 per cent h. d.). 

 7 mm. (39 per cent h. d.). 

 7 mm. (41 per cent h. d.). 

 5 mm. (41.7 percent h. d.) 



Longest 

 spines 



58 mm. 

 ca. 45 mm. 

 ca. 45 mm. 

 ca. 50 mm. 

 ca. 55 mm. 

 ca. 45 mm. 



