8 PROCEEDINGS OF THE NATIONAL MUSEUM V0L - m 



To summarize: Steyhanodrilus obscurus Goodnight, 1940, is desig- 

 nated the type of a new genus, Magmatodrilus; Branchiobdella tetra- 

 donta Pierantoni, 1906, unidentifiable and the types unavailable is 

 hence regarded as a nomen inquirendum; Branchiobdella americana 

 Pierantoni, 1912, is reduced to synonomy with Carnbarincola phila- 

 delphica (Leidy, 1851). Many thousands of specimens of branchiobdel- 

 lids from all parts of North America have been examined, none belong 

 to the genus Branchiobdella, and the conclusion is reached that no 

 species of this genus is endemic to North America. There are, then, 

 no known cases of intercontinental generic ranges among the 

 branchiobdellids. 



Literature Cited 



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 Goodnight, Clarence J. 



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