Ward.- — Fish Parasites and Parasitic Diseases 233 



Linton, E. 



1891a. On two species of larval Dibothria from the Yellowstone Na- 

 tional Park. Bulletin U. S. Fish Commission, vol. ix, 1889, 

 p. 65-79, pi. xxiii-xxvii. 



Describes Ligula catostomi from the body cavity of the sucker ami 

 records fragments of the same from the stomach of the trout. Also from 

 the abdominal muscles of the trout, Dibothrium cordiceps. 



1891b. Contribution to the life history of Dibothrium cordiceps, a 

 parasite infesting the trout of Yellowstone Lake. Ibid., 

 vol. ix, 1889, p. 337-358, pi. cxvii-cxix. 



Describes more fully this species, noted in earlier paper (1891a), 

 giving data on distribution, frequence, and effects on the host. Adult 

 stage found in the white pelican and discussed in detail together with 

 the general problem of parasitism in trout of Yellowstone Lake, tin- 

 cause, and the remedy. 



1891c. Notice of the occurrence of protozoan parasites (psorosperms) 

 on cyprinoid fishes in Ohio. Ibid., vol. ix, 18S9, p. 359-361. 



Description of an undetermined species on several small minnows. 



1X03. On fish Entozoa from Yellowstone National Park. Report 

 U. S. Fish Commission, 1899-91, p. 545-564, pi. 63-67. 



In addition to forms previously described (1891a) Monobothrium 

 terebrans from the sucker, and encysted distoma from the chub; Dw 

 Ionium laureatum from the trout; Echinorhynchus globosus from trout; 

 E. tuberosus from sucker and chub; Dachnitis globosa from trout and 

 three unidentified nematodes from the same host. 



1894. Some observations concerning fish parasites. Bulletin U. S. 

 Fish Commission, vol. xiii, p. 101-112. 



Discussion of frequence of parasites, distinctness of host relationships, 

 injurious effects of Entozoa, the remedies for parasitic diseases and the 

 important problems which present themselves to the helminthologist. 

 .Many details given concerning parasites of fresh-water fishes. 



1897. Notes on cestqde parasites of fishes. Proceedings U. S. 



National Museum, vol. xx, p. 423-456, 8 pi. 



Records Tania salvelini from lake trout; T, dilatata from eel; T. 

 Ocellata from rock bass; T. monobothrium hexacotyle from sucker: 

 Schistocephalus dimophus from blob; Cyathocephalus truncatus from 

 uhitefish, Dibothrium hastatum from paddlefish; Dibothrium infundibuli- 

 forme from lawyer and lake trout; Dibothrium ligula from sucker, 

 smelt, silver minnow, redfin; and other species not from fresh- water fish. 



1898a. An economical consideration of fish parasites. Bulletin U. S. 

 Fish Commission, vol. xvn, 1897, p. 194-199. 



General discussion of relations of parasites to fish culture. Con- 

 siders also effect of each type of parasite, their frequence and eco- 

 nomic importance. 



1898b. Notes on trematode parasites of fishes. Proceedings U. S. 

 National Museum, vol. xx, p. 507-548, 15 pi. 



Records from fresh-water fish : Diplostomum cuticola from various 

 sunfish; Distomnm aunculat.im, from the lake sturgeon; D, gracile from 

 the bluegill; besides others from migratory and marine lishes as well as 

 some unidentified species. 



1901a. Fish parasites collected at Woods Hole in 1898. Bulletin 

 U. S. Fish Commission, vol. xix, 1899, p. 267-304, pi. 33-43. 



Para-sites of salt-water fish save only one migrant, eel, which was 

 only very poorly infested. 



