OPHIURANS OF THE PHILIPPINE AND ADJACENT WATERS. 375 



kilometers (2.5 miles) distant (lat. 13 35' 27" N., long. 123 37' 

 18" E.) ; 787 meters (480 fathoms) ; June 18, 1909: gy. M. (m. b.). 



One specimen (Cat. No. 41191, U.S.N.M.). 



Notes. Ophiura clemens has a rather wide geographical range. 

 I based the species on specimens from the Siboga collection dredged 

 in numerous localities among the Sunda Islands between 694 and 

 1,633 meters (382 to 892 fathoms). The Travailleur and of the 

 Talisman expeditions had previously found it in the Gulf of Gas- 

 cony in 1,916 meters (1,013 fathoms). 



OPHIURA FLAGELLATA Lyman. 



Plate 85, figs. 1, 6, 7 ; plate 86, figs. 1-4, 10. 



See for bibliography : 



Ophioglypha flagellata KCEHLER ('04), p. 56; ('07a), p. 261. 



Ophiura flagellata H. L. CLARK ('11), p. 60; ('13), p. 208. MATSUMOTO 



('15), p. 81. H. L. CLARK ('15), p. 320. 

 Gymnophiura coerulescens LUTKEN and MORTENSEN ('99), p. 114. 



Localities. Albatross station 5582; in the vicinity of Darvel Bay. 

 Borneo; Si Amil Island (N.) bearing S. 22 W., 11.49 kilometers 

 (6.2 miles) distant (lat. 4 19' 54" N., long. 118 58' 38" E.) ; 1,628 

 meters (890 fathoms) ; September 26, 1909; gy. M., fne. S. 



One specimen (Cat. No. 41147, U.S.N.M.). 



Albatross station 5647; Buton Strait; North Island (S.) bearing 

 S. 87 E., 21.50 kilometers (11.6 miles) distant (lat. 5 34' 00" S., 

 long. 122 18' 15" E.) ; 949 meters (519 fathoms) ; December 16^ 

 1909; gn. M. 



Three specimens (Cat. No. 41146, E. 191, U.S.N.M.) 



Albatross station 5651; Gulf of Boni, Celebes; Buginkali Point 

 bearing S. 67 E., 38.92 kilometers (21 miles) distant (lat, 4 43' 50" 

 S., long. 121 23' 24" E.) 1,280 meters (700 fathoms) ; December 17, 

 1909. 



Three specimens (Cat. No. 41145, E. 192, U.S.N.M.) 



Notes. Ophiura flagellata is a well-known and easily recognizable 

 species which has been collected in the course of various explorations. 

 To the descriptions of Lyman and of Liitken and Mortensen (these 

 latter recording it under the name of GymnopMura coerulescens} 

 H. L. Clark has added a number of very interesting observations, 

 especially concerning the variations which this species shows regard- 

 ing the form of the radial shields, the length of the arm spines, the 

 number of the tentacle scales, and the degree of calcification of the 

 disk. It must also be added that variations may occur in the length 

 of the papillae of the radia comb. H. L. Clark shows these as very 

 long (11, fig. 15A), as do Liitken and Mortensen ('99, p. 7, fig. 6), 



