OPHIURANS OF THE PHILIPPINE AND ADJACENT WATERS. 289 



distant (lat. 12° 03' 30" N., long. 124° 03' 36" E.) ; 249 meters (136 

 fathoms) ; March 13, 1909; hrd. S. 



Five specimens (Cat. Nos. 41079, 41098, U.S.N.M.). 



Albatross station 5413; between Cebu and Bohol; Lauis Point 

 Light bearing N. 68° W., 18.5 kilometers (10 miles) distant (lat. 10° 

 10' 35" N., long. 124° 03' 15" E.) ; 77 meters (42 fathoms) ; March 

 24, 1909. 



One specimen (Cat. No. 41091, U.S.N.M.). 



Albatross station 5414; between Cebu and Bohol; Lauis Point 

 Light bearing N. 67° W., 17.60 kilometers (9.5 miles) distant (lat. 

 10° 10' 40" N., long. 124° 02' 45" E.) ; March 24, 1909. 



Two specimens (Cat. No. 41095, U.S.N.M.). 



Albatross station 5519; northern Mindanao and vicinity; Point 

 Tagolo Light bearing S. 71° W., 16 kilometers (8.7 miles) distant 

 (lat. 8° 47' 00" N., long. 123° 31' 15" E.) ; 333 meters (182 fathoms) ; 

 August 9, 1909 ; Glob., S. 



One specimen (Cat. No. 41097, U.S.N.M.). 



Albatross station 5545; Jolo Island and vicinity; Noble Point, 

 Tulayan Island (E.), bearing S. 19° W., 5.56 kilometers (3 miles) 

 distant (lat. 6° 04' 45" N., long. 121° 20' 20" E.) ; 208 meters (114 

 fathoms) ; September 15, 1909 ; fne. co. S. 



Six specimens (Cat. Nos. 41078, E. 20, U.S.N.M.). 



Notes. — The specimens exhibit well the essential characters of O. 

 fulgens which I described from specimens collected by the Siboga in 

 the Sunda Archipelago, but they show a few variations which it is 

 interesting to observe. 



In the Siboga specimens the dorsal surface of the disk, which is 

 covered with a thick integument, carries both club spines and true 

 spines ; in certain individuals the club spines remain in the condition 

 of conical granules which scarcely elongate toward the periphery 

 of the disk; the radial shields, which are of medium size, are tri- 

 angular and their length is equal to a third the radius of the disk. 

 The large upper arm plates are trapezoidal, a little broader than 

 long, sometimes more or less strongly keeled, sometime furnished in 

 the middle and toward the distal border with a small tubercle. These 

 plates are sometimes broken up, and they may show on their surface 

 a few irregularly disposed and also inconstant granules. The frag- 

 mentation of the upper arm plates is less marked than in O. elegans 

 and in O. pellicula, and the borders of the plates are always distinct. 

 It is not rare to find the plates quite whole over a more or less 

 extended portion of the length of the arms. On plate 43 as figure 9 

 I show a portion of an arm on which the breaking up of the dorsal 

 plates is carried to an extreme. The arms are always very long and 

 more or less strongly convoluted. The coloration of the specimens is 

 55269— 22— Bui. 100 19 



