NORTH PACIFIC OPHIURANS IN NATIONAL MUSEUM CLARK. 127 



temperature 38. 7, 8 specimens, station 5088, Sagami Bay, lat. 35 

 11' 25" N.; long. 139 28' 20" E., 369 to 405 fathoms, green mud, 

 bottom temperature 41.8, 1 specimen; station 5093, Uraga Strait, 

 lat. 35 3' 15" K; long. 139 37' 42" E., 302 fathoms, coarse black 

 sand, bottom temperature 43.9, 1 specimen; station 5095, Uraga 

 Strait, lat. 35 5' 34" N.; long. 139 38' 36" E., 58 fathoms, fine black 

 sand, broken shells, bottom temperature 57.8, 4 specimens; Kadiak, 

 1 specimen; Prince of Wales Island, 1 specimen; Dolgoi Sound, 1 



FIG. 47. OPHIOPHOLIS ACULEATA VAR. JAPONICA. a, E TREMK FORM WITH SMALL SUPPLEMENTARY 



UPPER ARM PLATES AND NUMEROUS LONG DISK SPINES, X 2.66 J 6, MORE USUAL FORM WITH FEWER DISK 



BPINES, X 3.33 ; c, UNUSUAL FORM WITH MANY DISK SCALES RESORBED, x 3.5 ; d, TYPICAL FORM WITHOUT 

 DISK SPINES, x 4. 



specimen; locality ?, 4 specimens. Bathymetrical range, 8 to 1,030 

 fathoms. Temperature range, 57.8 to 30.4. Two thousand two 

 hundred and eighty-two specimens. 



A number of these specimens agree so well with Lyman's figures 

 and description of japonica that I felt no doubt as to their identifica- 

 tion, even before comparison with a cotype of that species. But I 

 soon found that these specimens intergrade so completely with 



