NORTH AMERICAN PARASITIC COPEPODS BELONGING 

 TO THE LERNAEIDAE WITH A REVISION OF THE 

 ENTIRE FAMILY. 



By Charles Braxcii Wilson, 

 Department of Biology, State Normal School, Wcstflcld, MassachusettH. 



INTRODUCTION. 



The present is the thirteenth * paper in the series dealing with the 

 parasitic copepods in the collection of the United States National 

 Museum, and comprises the family of the Lernaeidae. 



This is the oldest family of the parasitic copepods and includes 

 some of the most eccentric and bizarre forms. The genera compos- 

 ing the family have often been wrongly interpreted, and their 

 systematic position and arrangement have been mere conjectures. 

 This was largely because they were imperfectly understood and 

 nothing was known of the male sex or of the life history. 



Tbe development of Pennella consists of a broken series of larval 

 forms described by different authors — Steenstnip and Liitken (ISGl), 

 Lubbock (18G0), AVierzejski (1877), Brady (1883), Liitken (1893), 

 and M. T. Thompson (lOOo). 



The development of Lernaeocera {Lernaea) was worked out in 

 admirable shape by Pedaschenko in 1898 and by A. Scott in 1901. 

 That of Sarcotretes was published by Jungersen in 1911, and the life 

 history of Lernaea {Lernaeocera) has just been completed by the 

 present autlior. We thus have now a life history for each of the 

 four subfamilies. These have all been included in a condensed form 



* The 12 preceding papers, all of which were published in the Proceedings of the 

 United States National Museum, are: 1. The Argulidac, vol. 25, pp. C3o-742, pis. S-27. 

 2. Descriptions of Argulid.ie, vol. 27, pp. (■,27-(;.").j, 3S text figures. 3. The Caliginne, 

 vol. 28, pp. 479-072, i)!s. 5-20. 4. The Trcbinae and Euryphorinae, vol. 31, pp. Ufift- 

 720, pis. 15-20. 5. Additional Notes on the Argulidae, vol. 32, pp. 411-424, pis. 29-32. 

 (5. The Pandarlnae and Cecropinac, vol. 33. pp. 323-490, pis. 17-43. 7. New Species 

 of Caiiginae, vol. 33, pp. .''>93-G27, pis. 49-50. 8. Parasitic Copepods from the Pacific 

 Coast, vol. 35, pp. 431-481, pis. 0C.-S3. 9. Development of Achtheres aml)Ioplitt8 

 Kellicott, vol. 39, pp. 189-220, pis. 29-30. 10, The Krgasilidae, vol. 39, pp. 2(;3-100, 

 pis. 41-00. 11. Descriptions of New (lenera and Species, vol. 39, pp. G25-034, pla. 

 (iij-GS. 12. The Lcrnaeopodidae, vol. 47, pp. 505-729, pis. 2.J-50. 



Proceedings U. S. National Museum. Vol. 53— 2194. 



77493— Proc.N.M.vol.53— 17 1 1 



