INTERNAL PAPLASITES OF THE SEBAGO SALMON. I161 



even in fresh water, and the resulting enrichment of its parasitic fauna with 

 Umnetic forms when it returns to the sea. 



The parasitic record reflects clearly the manner of life led by any host. 



In all, 33 species have been recorded from this salmon, making the list of 

 its parasites one of the longest known for any fish. The list of these is then 

 given, as follows: 



Ascaris adunca Rudolphi. 

 Ascaris angulata Rudolphi. 

 Ascaris clavata Rudolphi. 

 Ascaris (Agamonema) capsularis Diesing. 

 Ascaris (Agamonema) communis Diesing. 

 Ascaris aculeati von Linstow. 

 Cucullanus elegans Zeder. 

 Echinorhynchus proteus Westrumb. 

 Echinorhynchus pachysomus Creplin. 

 Echinorhynchus acus Rudolphi. 

 Echinorhynchus agilis Rudolphi. 

 Distomum varicum Zeder. 

 Distomum refle.xum Creplin. 

 Distomum miescheri Zschokke. 

 Distomum appendiculatum Rudolphi. 

 Distomum ocreatum Rudolphi. 

 Distomum tereticolle Rudolphi. 

 Distomum sp. Mcintosh. 

 Bothriocephalus infundibuliformis Rudolphi. 

 Bothriocephalus cordiceps Leidy. 

 Bothriocephalus osmeri (larva) von Linstow. 

 Bothriocephalus sp. i (larva) Zschokke. 

 Bothriocephalus sp. 11 (larva) Zschokke. 

 Bothriocephalus sp. iii (larva) Zschokke. 

 Schistocephalus dimorphus Creplin. 

 Trisenophorus nodulosus (larva) Rudolphi. 

 Leuckartia sp. Moniez. 

 Tetrabothrium minimum von Linstow. 

 Rhynchobothrium paleaceum Rudolphi. 

 Tetrarhynchus solidus. 

 Tetrarhynchus grossus Rudolphi. 



Tetrarhynchus macrobothrius von Siebold ( = Stenobothrium appendicu- 

 latum Diesing). 

 Tetrarhynchus sp. Mcintosh. 



The paper of Zschokke closes with a detailed discussion of the biology and 

 relationships of the individual salmon parasites, including citations of the work 

 of previous investigators on these forms. 



B. B. F. 1908— Pt 2—31 



