120 NATHAN FASTEN. 



above their terminations, the oviducts combine to form the sper- 

 matheca, which opens to the exterior through the two genital 

 pores. Within each oviduct a spiral gland can be seen, which 

 later develops into the cement gland. 



4. In order to effect fertilization, the male makes circling move- 

 ments while still attached to the host, thereby meeting a female. 

 Then the male releases his hold on the host, attaches himself to 

 the female, and moves down posteriorly in the vicinity of the 

 genital pores. 



5. The male bends his abdomen upward towards the female, 

 and extrudes the spermatophores from the reproductive organs. 

 These he manipulates with his second maxillae and soon attaches 

 them about the genital pores of the female. 



6. The spermatozoa wander from the spermatophores into the 

 spermatheca of the female and are stored until the eggs are ripe 

 enough to undergo fertilization. 



7. The eggs pass down the oviducts when mature, and are 

 fertilized by the stored spermatozoa as they pass the sperma- 

 theca. The embryos pass into the external egg-sacs, where they 

 develop into larvae. 



BIBLIOGRAPHY. 

 Fasten, N. 



'12 The Brook Trout Disease at Wild Rose and Other Hatcheries. (The 

 Brook Trout Disease in Wisconsin Waters.) Rep't. Wis. Fish Com., 1911- 

 1912, pp. 12-22. 

 '13 The Behavior of a Parasitic Copepod, Lernceopoda edivardsii Olsson. 



Jour, of An. Beh., Vol. 3, pp. 36-40. 

 Gruber, A. 



'79 Beitrage zur Kenntniss der Geschlechtsorgane der freilebenden Copepoden. 



Zeitschr. wiss. Zool., Bd. 32, pp. 407-442. 

 Ishikawa, C. 



'91 Studies on the Reproductive Elements. I. Spematogenesis, Ovagenesis, and 

 Fertilization in Diaplomus sp. Jour, of Col. of Sc., Imp. Univ., Japan, 

 Vol. 5, Pt. I., pp. 1-34. 

 Miculicich, M. 



'05 Zur Kenntniss der Gattung Brachiella Cuv. und der Orginisation der 



Lernaeopodiden. Zool. Anz., Bd. 28, pp. 599-620. 

 Wilson, C. B. 



'n North American Parasitic Copepods. Part 9. The Lernaeopodidae. Proc. 



U. S. Nat. Mus., Vol. 39, pp. 189-226. 

 Wright, R. R. 



'82 Notes on Parasitic Copepods, No. I. Proc. of Canad. Inst., Vol. I., pp. 

 243-254. 



