NORTH PACIFIC OPHIURANS IN NATIONAL, MUSEUM CLARK. 295 



face of oral frame and lower surface of arms covered with a smooth, 

 naked skin. Apex and sides of jaws more or less finely but irregularly 

 tuberculous. Teeth broad, truncate or bluntly pointed, about five 

 or six in each series. First pair of tentacles nearer mouth than they 

 are to margin of oral frame, without scales or spinules of any kind; 

 succeeding pairs protected by two subequal, finely thorny, very blunt, 

 club-shaped spines, not quite as long as a joint and half as thick as 

 long; on outer branches of arm, these spines become slender, and hook- 



FlG. 144. EURYALE ANOPLA. X 1-5. fl, FROM ABOVE; 6, FROM BELOW, C, SIDE VIE^V OF THREE ARM 



JOINTS NEAR DISK. 



bearing at tip. Color (dried from alcohol), dark brown, lighter at tips 

 of arms; oral frame and under side of arms dull yellow. 



Locality. Albatross station 4934, Eastern Sea, lat. 30 58' 30" X.; 

 long. 130 32' E., 103 to 152 fathoms, bottom temperature 60.6 to 

 56, 1 specimen. 



Type Cut. No. 25590, U.S.N.M., from station 4934. 



This species is so well characterized by the nearly naked disk and 

 the perfectly smooth arms that it can not be mistaken for either of 

 the other species of the genus. 



