OPHIURANS OF THE PHILIPPINE AND ADJACENT WATERS. 199 



tion in referring it to the same species, the more so since it comes 

 from a locality near that where the type was collected. Ljungman 

 says " hab. in profundo mari inter Bataviam et Singapore." The 

 term " profundo " is rather vague and may apply to very different 

 depths. 



In his memoir of 1915, in speaking of the genus Ophiocentrus, 

 Matsumoto says: " phiocentrus incl. Amphiocnida" ('15, p. 69, 

 note V). I believe also that there is really no important difference 

 between the genus O phiocentrus and the genus Amphiocnida which 

 Verrill established in 1899 ; it is advisable therefore, to assign to the 

 genus Ophiocentnis the species which up to the present have been 

 placed in the genus Ampkiocnida, and the former thus find itself 

 suddenly enriched with the many following species : 



phiocentrus aculeatus Ljungman. 

 Ophiocentnis alboviridis (Brock). 

 Ophiocentnis as per (Kcehler). 

 Ophiocentnis brachiatus (Montagu). 

 Ophiocentnis dilatatus (Kcehler). 

 Ophiocentnis inaequalis (H. L. Clark). 

 Ophiocentnis pilosus (Lyman). 

 Ophiocentnis putnami (Lyman). 

 phiocentrus semisquamatus (Kcehler). 

 O phiocentrus verticillatus (Doderlein). 



to which there must be added a new species which I shall describe 

 below under the name of Ophiocentrus vexator, making eleven spe- 

 cies in all. 



OPHIOCENTRUS ASPER (Kcehler). 



Plate 62, figs. 7-9 ; plate 96, fig. 12. 



Ophiocnida aspera Kcehler ('05), p. 29, pi. 2, figs. 11-13; ('07b), p. 244. 

 Amphiocnida aspera H. L. Clark ('15), p. 237. 



Locality. — Albatross station 5219; Gulf of Davao; Lanang Point 

 bearing N., 1.85 kilometers (1 mile) distant (lat. 7° 06' 06" N., 

 long. 125° 40' 08" E.) ; 42 meters (23 fathoms) ; May 18, 1908; Co., S. 



One specimen (Cat. No. 40950, U.S.N.M.). 



Notes. — The diameter of the disk is 6 mm., and the arms are about 

 45 mm. in length. 



I described this species from two specimens collected by the Siboga 

 in the Sunda archipelago, at depths between 54 and 36 meters (30 

 and 20 fathoms). 



The Albatross specimen differs from those of the Siboga collection 

 only in the outermost mouth papilla, which, instead of being elon- 

 gated with an obtuse point, remains rather low and a little broader 

 than long. The side arm plates carry five or six arm spines; the 



