OPHIURANS OF THE PHILIPPINE AND ADJACENT WATERS. 187 



agrees well with Duncan's description and figures, but as these last 

 are very schematic, I have thought it well to give here two photo- 

 graphs of an 0. affinis collected in the Kei Islands, which is better 

 preserved than the Albatross specimen. 



The type of 0. affinis was captured in the Korean (Chosen) Straits 

 at a depth of 37 fathoms. The Siboga found this species in the Kei 

 Islands at a depth of 90 meters (49 fathoms). 



OPHIACTIS DEFINITA, new species. 



Plate 64, figs. 1, 2, 7. 



Localities. — Albatross station 5119; Balayan Bay and Verde 

 Island Passage ; Sombrero Island bearing S. 80° E. 35.03 kilometers 

 (18.9 miles) distant (lat. 13° 45' 05" N., long. 120° 30' 30" E.) ; 721 

 meters (394 fathoms) ; January 21, 1908; gn. M., S. 



Two specimens (Cat. No. E. 49, U.S.N.M.). 



Albatross station 5598 ; Sibuko Bay, Borneo, and vicinity ; Sipadan 

 Island (W.) bearing S. 12° E., 7.04 kilometers (3.8 miles) distant 

 (lat. 4° 10' 35" N., long. 118° 37' 12" E.) ; 759 meters (415 fathoms) ; 

 September 28, 1909. 



Two specimens. 



Albatross station 5587. 



A few specimens (Cat. Nos. E. 51 [part], E. 52, U.S.N.M.). 



Albatross station 5589; Sibuko Bay, Borneo, and vicinity; Mabul 

 Island: (NW.) bearing N. 3° W., 5.19 kilometers (2.8 miles) distant 

 (lat, 4° 12' 10" N., long. 118° 38' 08" E.) ; 475 meters (260 fathoms) ; 

 September 29, 1909; fne. gy. S., gy. M. 



Two specimens (Cat. Nos. E. 48, E. 51 [part], U.S.N.M.). 



Albatross station 5619; Molucca Passage; Mareh Island (S.) bear- 

 ing S. 78° E., 12.87 kilometers 12.97 miles) distant (lat. 0° 35' 00" 

 N.. long. 127° 14' 40" E.) ; 796 meters (435 fathoms) ; November 27, 

 1909 ; fne. gy. S., M. 



One specimen (Cat. No. E. 46, U.S.N.M.). 



Albatross station 5637; Bouro Island (south) and vicinity; Am- 

 blau Island (N.) bearing N. 80° E., 38.92 kilometers (21 miles) dis- 

 tant (lat. 3° 53' 20" S., long. 126° 48' 00" E.) ; 1,280 meters (700 

 fathoms) ; December 10, 1909 ; gy. M. 



One specimen (Cat. No. E. 47, U.S.N.M.). 



Philippines. 



Three specimens (Cat. Nos. E. 45, E. 50, U.S.N.M.). 



Description. — I shall describe the species more especially on the 

 basis of the two specimens from station 5119, of which I give photo- 

 graphs (pi. 64, figs. 1, 2, 7). 



The diameter of the disk is 9 mm. ; the length of the arms is from 

 30 mm. to 32 mm. The arms, always five in number, are broad and 



