TREASURY DEPARTMENT. 
Public Health and Marine-Hospital Service of the United States. 
Walter Wyman, Surgeon-General. 
YGIENIC LABORATORY.— BULLETIN No. 18. 
jM. J. ROSEN.A.U, Director. 
September, 1904. 
An account of the Tapeworms of the genus 
Hymenolepis parasitic in man. 
INCLUDING 
Reports of several new cases of the Dwarf Tapeworm 
{H* nana) in the United States. 
BY 
BRA.YT01S: B. R^r^SONl. 
WASHINGTON: 
GOVERNMENT PRINTING OFFICE. 
1904. 
