436 Roosevelt Wild Life Annals 



of a four inch Perch about the nest of a Kingfisher. Lamprey scars were often 

 seen on dead or dying Perch in Oneida Lake (No. 440). 



Perch are subject to many diseases and have many parasites (Pearse and 

 Achtenberg, '20, p. 339). They were frequently found dead in Oneida Lake, and 

 were then usually covered with considerable water mold (No. 440). Marshall 

 and Gilbert found only nine individuals seemingly free from parasites out of 72 

 examined ('05, p. 520). LaRue and others ('26, p. 285; Butler, '19, p. 116) 

 found larval trematodes in the eyes of Perch taken from Douglas Lake, Michigan. 



A list of important parasites of this species follows : 



Protozoans 

 Henneguya wlsconsinensis Mavor and Strasser. Pearse and Achtenberg (20, 



P- 334)- 



Trematodes 

 Buuodera htciopercae ( O. F. Miiller). Pearse and Achtenberg ('20, p. 334)- 

 Buiiodcra ii,>(hilosa Zeder. Stafford ('04, p. 489). 

 PhyUodistiimiiiu stipitrhum Stafford. Pearse ('24. p. 163); Stafford ('04. P- 



49-'). 

 Clinostouiniu marginatum (Rudolphi). Pearse ('24, p. i/i); Smallwood ('14, 



p. II) ; Osborn ('11, p. 354) ; Pearse and Achtenberg ('20, p. 334) ; Pratt 



'2Z, p. 66. 

 Crepidostomuin eorniitum (O.-^born). Pearse and Achtenberg ('20, p. 335). 

 Stephanophialia farionis O. F. Miiller. Pearse ('24, p. 173) ; Faust ('18, p. 195). 

 Asygia longa (Leidy). Manter ('26, p. 72) ; Ward ('10, p. 1182). 

 Microphallus opaeus Ward. Bangham ('26, p. loi). 

 BuccpJialus pusillus Cooper. Ward and Whipple ('18, p. 379). 



Ce-stodes 

 Protcoccphalus pcarsei La Rue. Pearse and Achtenberg ('20, p. 334) ; Bangham 



('25, p. 256) ; La Rue ('19a, p. 117). 

 Protcoccphalus ambloplitis (Leidy). Pearse ('24, p. 175) ; La Rue ('19a, p. 117). 

 Triaenophorus nodidosus Pallas. Pearse ('24, p. 176). 

 Diphyllobotlirium latum L. Pratt ('16, p. 194). 

 Ligula hitcsliualis L. Pratt ('16, p. 193). 

 Bothriocepliuhis cuspidatus (Cooper). La Rue ('19a, p. 117). 



.^CANT^OCEPHALA 



Neoechinorhynchus cylindratus (Van Cleave). Pearse ('24. p. 180) ; Pearse and 



Achtenberg ('20, p. 335). 

 Echinorhynchus thecatus Linton. Pearse and Achtenberg ('20, p. 335) ; Pearse 



('24, p. 179) ; Van Cleave ('19, p. 9). 

 Echinorhynchus coregoni Linkins. Pear.se ('24, p. 179). 

 Echinorhynchus salvdini Linkins. Pearse ('24, p. 179)- 



Nematodes 

 Ichthyoncma cylindraccum Ward an<l Magath. Pearse ('24, p. 178). 

 Dachniloidcs cotylophnra Ward and Magath. Ward and Whipple ('19, p. 530). 



