440 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



The dorsal surface of the disk is of a rather light brown ; the arms 

 are a little darker. In the middle of each upper arm plate there is a 

 more or else elongated white spot, which on the eight or ten first seg- 

 ments comes in contact with the following spot in such a way as to 

 form an almost continuous band. At intervals a feebly marked white 

 annulation occurs. The ventral surface of the disk and of the arms is a 

 slightly yellowish white except for the denuded portion of the ven- 

 tral surface of the disk, which is quite white. 



Affinities and distinctive features. The type of the genus OpJiio- 

 pallas is 0. paradoxa, which was discovered by the Siboga in the 

 Sunda Archipelago and rediscovered by the Albatross at the differ- 

 ent stations given above. The new species is distinguished from O. 

 paradoxa by a more robust habitus, by having the arms broader and 

 shorter, by having the arm spines flattened and lanceolate in form,, 

 their length diminishing toward the dorsal side, while in 0. para- 

 doxa the dorsal spines are the longest, by having the disk more 

 strongly notched at the base of the arms on the dorsal surface, by the 

 pointed proximal angle of the mouth shields, by the considerable 

 broadening of the outermost mouth papilla, by the form of the under 

 arm plates, the distal border of which is slightly notched, and espe- 

 cially by the presence of two tentacle scales instead of a single one. 



OPHIERNUS ADSPERSUS Lyman. 



See for bibliography : 



Ophiernus adspersus KCEHLER ('04), p. 20; ('07), p. 251. H. L. CLARK ('11), 

 p. 95; ('13), p. 212. K(EHLER ('14), p. 95. H. L. CLARK ('15), p. 347. 

 MATSUMOTO ('17), p. 307. 

 Ophiernus annectens LUTKEN and MORTEN SEN ('99), p. 107. 



Localities. Albatross station 5123; east coast of Mindoro; Mala- 

 brigo Light bearing N. 44 W., 60.23 kilometers (32.5 miles) distant 

 (lat. 13 12' 45" N., long. 121 38' 45" E.) ; 51T meters (283 fath- 

 oms) ; February 2, 1908 ; gn. M. 



Twenty specimens (Cat, No. E. 353, U.S.N.M.). 



Albatross station 5124; east coast of Mindoro; Point Origon (N.) 

 bearing S. 56 E., 38.45 kilometers (20.75 miles) distant (lat. 12 

 52' 00" N., long. 121 48' 30" E.) ; 514 meters (281 fathoms) ; Feb- 

 ruary 2, 1908 ; sf t. gn. M. 



Five specimens (Cat. No. E. 355, U.S.N.M.). 



Albatross station 5373; Marinduque Island and vicinity; Tayabas 

 Light (outer) bearing N. 20 E., 27.79 kilometers (15 miles) distant 

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

 fathoms) ; March 2, 1909; sft. M. 



One small specimen (Cat. No. 41331, U.S.N.M.). 



Albatross station 5423; Jolo Sea; Cagayan Island (S.) bearing S. 

 11 E., 8.89 kilometers (4.8 miles) distant (lat. 9 38' 30" N., long. 



