LETTER OF TRANSMITTAL 



U. S. DEPARTMENT OF AGRICULTURE, 



BUREAU OF ANIMAL INDUSTRY, 



Washington, D. O., July W, 1905. 



SIR: I have the honor to transmit herewith for publication a techni- 

 cal manuscript entitled "The Determination of Generic Types, and a 

 List of Round worm Genera, with their Original and Type Species", 

 prepared by Doctors Stiles and Hassall. 



Medical, veterinary, and zoological literature has been inconven- 

 ienced to no slight degree by changes in the technical names, due to a 

 failure on the part of authors to designate lype species for their 

 genera. The present paper is prepared in tne hope of definitely fixing 

 the types for the round worm genera, especially for those of impor- 

 tance in human and comparative medicine, so that confusion in the 

 future may be reduced. 



The adoption of a rule by the International Commission on Zoolog- 

 ical Nomenclature to the effect that no new generic name may demand 

 recognition in the future unless its author definitely fixes the type at 

 its original publication is worthy of serious consideration, as such a 

 rule would greatly simplify work. 



Respectfully, D. E. SALMON, 



Chief of Bureau. 

 Hon. JAMES WILSON, 



Secretary of Agriculture. 



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