Ward. — Fish Parasites and Parasitic Diseases 239 



Ward, H. B. — Continued. 



1907. The influence of parasitism on the host. Science, n. s., vol. 



xxv, p. 201-218; also in Proceedings American Association 

 for the Advancement of Science, 56th meeting, p. 489-523. 



Discussion of the precise influence of parasites on host; summarized 

 in the introduction to this paper. Frequent references to fish. Discusses 

 influence of lamprey, effect of broad fish tapeworm, and other fish 

 parasites. 



1908. Some points in the migration of Pacific salmon as shown by 



its parasites. Transactions American Fisheries Society, 

 37th meeting, p. 92-100. 



Records species present and their probable origin, as well as the 

 effect on them of the trip up fresh-water streams to the spawning 

 grounds. 



1909. The influence of hibernation and migration on animal para- 



sites. Proceedings 7th International Zoological Congress, 

 Boston, 12 p. 



Compares conditions in marine, migratory and fresh-water fishes, as 

 regards distribution, occurrence and abundance of parasites. 



1910. Internal parasites of the Sebago salmon. Bulletin U. S. Bu- 



reau of Fisheries, vol. xxvm, 1908, p. 1151-1194. 



Records from Sebago salmon Asygia sebago, Abothrium crassum, 

 Proteocephalus pusillus, bothriocephalid larvx and unidentified nema- 

 todes. The total number of parasites found is very small; the species 

 are characteristic of fresh water. The paper gives also records of 

 parasites found in the European salmon and compares conditions witli 

 those in the Sebago form. 



Washburn, F. L. 



1886. Mortality of fish at Lake Mille Lac, Minn. American Natu- 

 ralist, vol. xx, p. 896-897. 



An annually recurring epidemic in summer which destroys thousands 

 of fish is caused by an external parasite, one of the Siphonostomata ; 

 some fish show large eaten patches on the sides and belly. The wall- 

 eye is most seriously affected, but perch, rock bass, black bass, calico 

 bass, crappie, a whitefish, the ling, bowfin, pike and large suckers are 

 also attacked. 



Wilson, C. B. 



1902. North American parasitic copepods, of the family Argulidas, 

 with a bibliography of the group and a systematic review 

 of all known species. (Paper 1.) Proceedings U. S. Na- 

 tional Museum, vol. xxv, p. 635-742, pi. 8-27. 



Discusses habits of these ectoparasites. Argulus catostomi occurs 

 on the sucker and chub sucker, and will attack sunfish, dace, perch and 

 minnow. A. versicolor lives on pickerel, but was raised on redfins. 

 Records epidemics due to these species and experiments in limiting the 

 number of such parasites by introducing surface-feeding fish to prey on 

 the free-swimming larva:. Extended discussion of habits with key to 

 species and descriptions of each. Argulus lepidostei from the gar, 

 . /. stisostethii from blue pike, A. maculosus from muskallunge, A. 

 ar.iericanus from the bowfin, are North America fresh-water species. 



19(14. A new species of Argulus, with a more complete account of 

 two species already described. (Paper 2.) Ibid., vol. xxvii, 

 p. 627-655, 38 fig. 



Detailed description of structure and development of A. americanus 

 from the bowfin, A. versicolor from pickerel, and A. trilincata from 

 goldfish. 



