TREASURY DEPARTxMENT. 
Public Health and Marine-Hospital Service of the United States. 
Walter Wyman, Surgreon-General. 
HYGIENIC LABORATORY.— BULLETIN No. 18. 
IVI. J. Director. 
September, 1904. 
An account of the Tapeworms of the genus 
Hymenolepts parasitic in man* 
INCLUDING 
Reports of several new cases of the Dwarf Tapeworm 
nana) in the United States. 
BY 
H. RAXSOXl. 
WASHINGTON: 
GOVERNMENT PRINTING OFFICE. 
1904. 
