174 RECENT OPHIURANS. 



39. 0. TROPICUS Lyman, 1S78. BuU. M. C. Z., 5, p. 157, pi. 7, f. 190-192. 



9 specimens. Off Martinique, 357-5022 fms. Off Grenada, 461 fms. Off 

 Barbados, 103 fms. 



Species of Ophioscolex not represented in the M. C. Z. 



40. O. PERTINAX Koehler, 1904. Siboga-exp. Oph. mer prof., p. 145, pi. 25, f. 7, 8. Kei Islands: 



near Pulu Kor, 225 tms. 



41. O. PROLIFER Studer, 1882. Abh. K.-Preus. akad. wiss. Berlin, p. 28, pi. 3, f. 13a-13e. East of 



New Zealand, 597 fms. 



42. O. QUADRISPINUS Verrill, 1885. Rept. U. S. F. C. for 1883, p. 550, pi. 20, f. 56-56a. Off 



Nova Scotia and in Gulf of Maine, 101-234 fms. 



43. 0. RETECTUS Koehler, 1895. Rev. biol. Nord France, 7, p. 462. Bay of Biscay, 784 fms. 



44. O. SERRATUS H. L. Clark, 1901. Bull. U. S. F. C, 2, p. 250, pi. 14, f. 14-17. Porto Rico: 



off San Juan, 91 fms. 



Genera of Ophiomyxidae not represented in the M. C. Z. 

 Neoplax Bell, 1884. Alert rept., p. 511. 



45. Type-species; NEOPLAX OPHIODES Bell, 1884. op. cit., p. 512, pi. 45. Monotypic. Amir- 



ante Islands: D'Arros, 22 fms. 



Ophiomora Koehler, 1907. Bull, sci., 41, p. 342. 



46. Type-species: OPHIOMORA ELEGANS Koehler, 1907. loc. cit., pi. 14, f. 52, 53. Monotypic. 



Portugese East Africa: Bahia Fernao Veloso. 



Ophiohymen H. L. Clark, 1911. Bull. 75 U. S. N. M., p. 277. 



47. Type-species: OPHIOHYMEN GYMNODISCUS H. L. Clark, 1911. loc. cit., f. 140. Mono- 



typic. Eastern Sea, 107-139 fms. 



Ophiostyracium H. L. Clark, 1911. Bull. 75 U. S. N. M., p. 253. 



48. Type-species: OPHIOSTYRACIUM TRACHYACANTHUM H. L. Clark, 1911. loc. cit, f. 



124. Monotypic. Eastern Sea, 440 fms. 



Ophioleptoplax H. L. Clark, 1911. Bull. 75 U. S. N. M., p. 278. 



49. Type-species: OPHIOLEPTOPLAX MEGAPORA H. L. Clark, 1911. op. cit., p. 279, f. 141. 



Monotypic when established. Eastern Sea, 71 fms. 



50. O. ATLANTICA Koehler, 1914. BuU. 84 U. S. N. M., p. 124, pi. 15, f. 6, 7. Florida: off Cape 



Canaveral, 509 fms. 



