RECENT OPHIURANS. 203 



and by Koehler is sufficient to show how different the two species are. The 

 disk covering in particular is an excellent distinguishing character. As stated 

 above (p. 198), the species curima, meiallacia, and vepratica are nearly related, 

 but metallacta is less like either of the others than they are like each other. It 

 has no spinules on the disk, while they normally do. 



250. 0. MILLESPINA Vebkill, 1879. Proc. U. S. N. M., 2, p. 203. Plate 3, f. 5, 6. 



9 specimens. East of Cape Cod, 306-524 fms. Off Newport, 192 fms. 

 Off Maryland, 1423 fms. 



251. O. MONILIFORMIS Lutken and Mortensew, 1899. Mem. M. C. Z., 23, p. 171, pi. 17, f. 5-8. 



4 specimens, including 3 cotypes. Lower California: southwest of San 

 Cristobal Bay, 284 fms. Mexico: neab Las Tres Marias Islands, 676-680 

 fms. 



252. 0. NORMANI Lyman, 1879. Bull. M. C. Z., 6, p. 58, pi. 15, f. 414-416. 



335 specimens, including 4 cotypes. Bering Sea, 764 fms. Off British 

 Columbia, 876 fms. Off Washington, 477-786 fms. California: southwest of 

 Monterey Bay, 659 fms. ; southwest of Santa Rosa Island, 534 fms. ; southwest 

 of Santa Cruz Island, 640 fms. Gulf of California, 905 fms. Japan: south 

 coast of Hokkaido, 464 fms.; off Omai Saki Light, 662 fms.; Sagami Sea, 

 345 fms. 



253. O. OEDIDISCA H.L.Clark, 1911. Bull 75 U. S. N. M., p. 219, f. 101. 



2 PARATYPES. Japan: off east coast, 544-545 fms.; Bungo Channel, 

 405-578 fms. 



254. O. OMOPLATA H.L.Clark, 1911. Bull. 75 U. S. N. M., p. 202, f. 93. 



1 paratype. Sea of Japan: off Korea, 163 fms. 



255. O. PACIFICA Lutken and Mortensen, 1899. Mem. M. C. Z., 23, p. 166, pi. 15, f. 4-6. 



13 cotypes. Off Ecuador, 1573 fms. 



256. 0. PENTACRINUS Lutken, 1869. Add.ad hist. Oph, pt. 3, p. 46. Koehler, 1914 Bull 84 

 U. S. N. M., pi. 9, f. 3, 4. 



166 specimens, including 5 cotypes of 0. meridionalis Lyman. Off South 

 Carolina, 257 fms. Florida: off Florida Keys, 237 fms. ; off Sand Key, 128 fms.; 

 south of Marquesas Key, 296 fms.; northwest of the Tortugas, 339-539 fms. 

 Cuba: off Havana, 175 fms. Off St. Cruz, D. W. I., 451-625 fms. Off 

 Dominica, 333-390 fms. Off Martinique, 317-502 fms. Off St. Lucia, 422- 



