NEW NOETH AMERICAN PARASITIC COPEPODS, NEW HOSTS, AND NOTES ON COPEPOD NOMENCLATURE. By Charles Branch Wilson, Department of Biology, State Normal School, Westfield, Massachusetts. INTRODUCTION. This is the seventeenth paper in the series dealing with the para-sitic copepods in the collection of the United States National Mu-seum.^ It is chiefly concerned with two collections recently re-ceived by the author. One of these was from Dr. H. M. Smith, former Commissioner of Fisheries, and included specimens collected by him at Woods Hole during the summer of 1922. The other was from Dr. Edwin Linton, the able parasitologist, and was made up of specimens collected at Woods Hole during the past 15 years. To both of these investigators sincere thanks are returned for the material thus placed at the author's disposal. To these collections have been added specimens sent for identifica-tion, and a few others belonging to the original lot sent from the United States National Museum. Together these constitute an im-portant addition to the valuable Museum series, in which they appear under the numbers here recorded. They include a new genus, sev-eral new species, and many new hosts. ^ The sixteen preceding papers, all of which, were published in the Proceedings of the ■United States National Museum, are: 1. The ArguUdae, vol. 25, pp. 635-742, pis. 8-27. 2. Descriptions of Argulidae, vol. 27, pp. 627-655, 38 text figures. 3. The Caliginae, vol. 28, pp. 479-672, pis. -5-29. 4. The Trebinae and Euryphorinae, vol. 31, pp. 669-720, pis. 15-20. 5. Additional Notes on the Argulidae, vol. 32, pp. 411-424, pis. 29-32. 6. The Pandarinae and Cecropinae, vol. 33, pp. 323-490, pis. 17-43. 7. New Species of Caliginae, vol. 33, pp. 593-627, pis. 49-56. 8. Parasitic Copepods from Pacific Coast, vol. 35, pp. 431-481, pis. 66-83. 9. Development of Achtheres ambloplitis Kellicott, vol. 39, pp. 189-226, pis. 29-36. 10. The Ergasilidae, vol. 39, pp. 263-400, pis. 41-60. 11. Descrip-tions of new genera and species, vol. 39, pp. 625-634, pis. 65-68. 12. Descriptions of new species, vol. 42, pp. 233-243, pis. 30-34. 13. The Lernaeopodidae, vol. 47, pp. 565-729, pis. 25-56. 14. The Lernaeidae, vol. 53, pp. 1-150, pis. 1-21. 15. The Sphyriidae, vol. •55, pp. 549-604, pis. 50-59. 16. The Dichelesthiidae, vol. 60, Art. 5, pp. 1-100, pis 1-13. No. 2507. — Proceedings U. S. National Museum, Vol. 64, Art. 17. 1
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