OPHIURANS OF THE PHILIPPINE AND ADJACENT WATERS. 399 



One specimen (Cat. No. 41362, U.S.N.M.). 



Albatross station 5373; Marinduque Island and vicinity; Tayabas 

 Light (outer) bearing N. 20° E., 27.80 kilometers (15 miles) distant 

 (lat. 13° 40' 00" N.,long. 121° 31' 10" E.) ; 618 meters (338 fathoms) ; 

 March 2, 1909 ; sft. M. 



One specimen (Cat. No. 41357, U.S.N.M.). 



Albatross station 5429; off eastern Palawan; Fondeado Island 

 (SE.) bearing N. 18° E. 27.79 kilometers (15 miles) distant (lat. 9° 

 41' 30" N., long. 118° 50' 22" E.) ; 1,400 meters (766 fathoms) ; 

 April 5, 1909 ; gn. M. 



One specimen (Cat. No. 41368, U.S.N.M.). 



Albatross station 5527 ; between Siquijor and Bohol Islands, Balica- 

 sag Island (C.) bearing N. 14° W., 15.20 kilometers (8.2 miles) dis- 

 tant (lat. 9° 22' 30" N., long. 123° 42' 40" E.) ; 717 meters (392 

 fathoms) ; August 11, 1909 ; glob. Oz. 



Four specimens (Cat. No. 41365, U.S.N.M.). 



Albatross station 5538; between Negros and Siquijor; Apo Island 

 (C.) bearing S. 64° W., 13.53 kilometers (7.3 miles) distant (lat, 9° 

 08' 15" K, long. 123° 23' 20" E.) ; 468 meters (256 fathoms) ; 

 August 19, 1909 ; gn. M., S. 



One specimen (Cat. No. 41364, U.S.N.M.) 



Albatross station 5623; between Gillolo and Makyan Islands; 

 Makyan Island (S.) bearing S. 88° W., 13.90 kilometers (7.5 miles) 

 distant (lat. 0° 16' 30" N., long. 127° 30' 00" E.) ; 497 meters (272 

 fathoms) ; November 29, 1909; fne. S., M. 



One specimen. 



No locality. 



Two specimens (Cat. No. 41367, U.S.N.M.). 



Description. — In the majority of these specimens the diameter of 

 the disk usually varies between 15 mm. and 18 mm.; the specimen 

 from station 5623 is very much larger than the others, and the diame- 

 ter of its disk reaches 27 mm. Some are smaller ; in one of the two 

 from station 5123 the diameter of the disk is only 10 mm., and in 

 those from station 5527 this diameter varies between 11 mm. and 

 14 mm. 



I shall describe the species especially from the specimen from sta- 

 tion 5378, in which the diameter of the disk is 18 mm. ; its arms are 

 not complete; I include two photographs of it (pi. 89, figs. 1, 2). 

 I shall mention also the larger individual from station 5259; the 

 diameter of its disk is 17 mm.; three of its arms, which are pre- 

 served for almost their entire length, measure from 60 mm. to 65 mm. 



The disk is rounded and the dorsal surface is almost plane; the 

 ventral surface is slightly convex, and the borders are rounded. 



The dorsal surface is covered in the central region by subequal 

 polygonal plates, with the angles rounded, which are not very nu- 



