NORTH PACIFIC OPHIURANS IN NATIONAL MUSEUM CLARK. 123 



toniperature 46.4°, 8 specimens; station 3672, off California, lat. 

 37" 30' N.; long. 123° 2' W., 68 fathoms, sand, coral, rocks, bottom 

 temperature 49°, 6 specimens. Bathymetrical range, 39 to 204 fath- 

 oms. Temperature range, 51.8° to 42.6°. Two hundred and eighty- 

 three specimens. 



After this report had been completed, McClendon's paper on the 

 ophiurans of the San Diego Region appeared, and it became 

 evident that this OpMopJiolis, which I had described and figured as 

 new, was identical with the species to which he had given the name 

 bakeri. But I determined to let my description and figures stand 

 for comparison with those of longispina to which bakeri is very nearly 

 allied. Typical specimens of the two forms are so different that 

 anyone would regard them as perfectly distinct species, but some 

 specimens of longispina have numerous disk spines which crowd 

 around the radial shields, though not actually encroaching on them, 

 while in some specimens of bakeri the spines on the radial shields are 

 much smaller and farther apart than elsewhere. I have not seen a 

 specimen which could not be placed in one species or the other with 

 little hesitation, and for that reason it seems best to use two names, 

 but it must be admitted that the line of separation between the two 

 forms is very narrow. It is interesting to note that although baJceri 

 ranges much farther south, the geographical areas of the two overlap, 

 while the bathymetrical and temperature ranges are quite distinct. 



OPHIOPHOLIS ACULEATA var. JAPONICA. 



Ophiopholis japonica Lyman, Bull. Mus. Comp. Zool., vol. G, 1879, p. 42. 



Localities. — Albatross station 2842, off Alaska, lat. 54° 15' N. ; long. 

 166° 3' W., 72 fathoms, pebbles, bottom temperature 41°, 18 speci- 

 mens; station 2843, off Alaska, lat. 53° 56' N.; long. 165° 56' W., 45 

 fathoms, broken shells, pebbles, bottom temperature 43.5°, 2 speci- 

 mens; station 2846, off Alaska, lat. 54° 8' N.; long. 162° 44' W., 44 

 fathoms, gravel, bottom temperature 42°, 115 specimens; station 2847, 

 off Alaska, lat. 55° 1' N. ; long. 160° 12' W., 48 fathoms, fine gray sand, 

 bottom temperature 42°, 1 specimen; station 2849, off Alaska, lat. 

 55° 16' N. : long. 160° 28' W., 69 fathoms, green mud, bottom tempera- 

 ture 43°, 24 specimens; station 2853, off Alaska, lat. 56° N. ; long. 154° 

 20' "W., 159 fathoms, gray sand, bottom temperature 41°, 11 speci- 

 mens; station 2854, off Alaska, lat. 56° 55' N.; long. 153° 4' W., 60 

 fathoms, black sand, bottom temperature 42.8°, 2 specimens; station 



2856, off Alaska, lat. 58° 7' N. ; long. 151° 36' W., 68 fathoms, gray 

 sand, black specks, bottom temperature 44°, 20 specimens; station 



2857, off Alaska, lat. 58° 5' N. ; long. 150° 46' W., 51 fathoms, broken 

 shells, gray sand, bottom temperature 44.6°, 10 specimens; station 



2858, off Alaska, lat. 58° 17' N. ; long. 148° 36' W., 230 fathoms, blue 

 mud, gravel, bottom temperature 39.8°, 67 specimens; station 3212. 



