PROCEEDINGS OF THE UNITED STATES NATIONAL MUSEUM 



SMITHSONIAN INSTITUTION 



U. S. NATIONAL MUSEUM 



Vol. 84 Washington: 1937 No. 3014 



A NEW SPECIES OF TREMATODE FROM THE MUD-EEL 

 (SIREN LACERTINA) 



By C. CouRSOx Zeliff 

 Pennsylvania State College, State College, Pa. 



An examination of material scraped from the intestinal mucosa 

 of the miid-eel {Siren lacertina Linnaeus) disclosed the presence of a 

 minute trematode, herein described as a new species of the genus 

 Cercorckis Liihe, 1900. 



The confusion of the genera Cercorchis and Telorchis Looss, 1899, 

 appears to have been settled hj Perkins (1928), who raised Cercorchis to 

 full generic rank. Harwood (1932) accepts this distinction and points 

 out the necessity of transferring all North American species of the 

 genus Telorchis to Cercorchis. Stunkard (1916) described T. corti, T. 

 lohosus, T. mediusy and T. diminutus; MacCallum (1918) T. insculpti, 

 T. pallidus, T. chelopi, and T. guttati from turtles; Chandler (1923) 

 T. stunkardi from Amphiuma means; Perkins (1928) C. necturi from 

 Necturus maculosus; Ingles (1930) T. stenonura from Clemmys mar- 

 morata; Mehra and Bokhari (1931) C. dhongokii from the tortoise 

 Kachuga ahongoka of India; Harwood (1932) C. texanus and C. bairdi 

 from reptiles; Bennett (1935) C. singularis from two genera of turtles 

 (with a discussion of the genera as defined by Perkins); and Byrd 

 (1936) C. kinosierni from the mud turtle. No claim of completeness 

 is vouched for in the list given. The relationship that exists between 

 Siren and Amphiuma, including also the proximity of habitat of these 

 and the mud turtle Kinosfernon, does not necessarily mean that the 



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