196 BULLETIN 75, UNITED STATES NATIONAL MUSEUM. 



Island, lat. 38 9' N.; long. 138 32' 12" E., 245 fathoms, fine brown 

 mud, bottom temperature 33.1, 28 specimens; station 4820, off Sado 

 Island, lat. 37 37' N.; long. 138 19' E., 536 fathoms, green mud, 

 bottom temperature 32.4, 3 specimens; station 4822, off Noto 

 Peninsula, Japan, lat. 37 8' 10" N.; long. 137 8' E., 130 fathoms, 

 green mud, bottom temperature 39.4, 11 specimens; station 4828, 

 Sea of Japan, lat. 37 23' N.; long. 137 36' E., 163 fathoms, green 

 mud, bottom temperature 34.9, 13 specimens; station 4861, off 

 Korea, lat. 36 19' N.; long. 129 47' E., 163 fathoms, green mud, 

 bottom temperature 33.4, 19 specimens; station 4862, off Korea, 

 lat. 36 20' N.; long. 129 50' E., 184 fathoms, green mud, bottom 

 temperature 32.9, 2 specimens; station 4982, Sea of Japan, lat. 43 

 N.; long. 140 10' 30" E., 390 to 428 fathoms, green mud, bottom 

 temperature 32.7, 3 specimens; station 4984, Sea of Japan, lat. 43 

 4' 20" N.;long. 140 12' 10" E., 224 to 248 fathoms, green mud, bot- 

 tom temperature 33, 6 specimens; station 4986, Sea of Japan, lat. 43 

 1' 40" N.; long. 140 22' 40" E., 172 fathoms, fine black sand, black 

 mud, bottom temperature 33.9, 1 specimen; station 4997, Gulf of 

 Tartary, lat. 47 38' 40" N.; long. 141 24' 30" E., 318 fathoms, green 

 mud, bottom temperature 32.8, 8 specimens. Bathymetrical range, 

 130 to 536 fathoms. Temperature range, 39.4 to 32.4. One hun- 

 dred and fifty specimens. 



This species is another example of an Ophiuran with an apparently 

 circumpolar range, extending southward in both the Atlantic and 

 Pacific oceans. It belongs thus in the same class with Ophiura sarsii, 

 Ophiura nodosa, and Ophiopholis aculeata. It is noticeable, however, 

 that the extension southward is only along the Asiatic side of the 

 Pacific and not along the American coast. The Pacific specimens are 

 apparently indistinguishable from individuals collected along the east 

 coast of North America. 



OPHIACANTHA PENTAGONA. 



Ophiacantha pentagona KCEHLER, Ann. Sci. Nat. Zool. (8), vol. 4, 1897, p. 342. 



Localities. Albatross station 3698, off Manazuru Zaki, Honshu 

 Island, Japan, 153 fathoms, green mud, volcanic ashes, sand, 1 speci- 

 men; station 3713, off Ose Zaki, Honshu Island, Japan, 45 to 48 

 fathoms, volcanic sand, shells, rocks, 1 specimen; station 3717, off 

 Ose Zaki, Honshu Island, Japan, 63 to 100 fathoms, volcanic sand, 

 shells, rocks, 3 specimens; station 3737, off Port Heda, Honshu Island, 

 Japan, 161 to 167 fathoms, green mud, volcanic sand, 1 specimen; 

 station 3758, off Suno Saki, Honshu Island, Japan, 52 to 73 fathoms, 

 blue clay, rocks, 10 specimens; station 4879, Korea Strait, lat. 37 

 17' N.; long. 130 15' E., 59 fathoms, fine gray sand, broken shells, 

 bottom temperature 62.1, 2 specimens; station 4891, Eastern Sea, 

 lat. 32 27' N.; long. 128 34' E., 181 fathoms, gray sand, broken 



