JOURNAL OF THE COLLEGE OF SOIENCE, IMPERIAL UNIVERSITY, 

 TOKYO, JAPAN, 



VOL. XX., ARTICLE 7. 



On a New Cestode Larva Parasitic in Man 



(I^lerocercoitles pt'olifer). 



By 



Isao Ijima, Rig., Ph. D., Rig. -Hah, 

 Professor of Zoology, Imperial University, Tokyo. 



With one plate. 



The remarkable Cestode larva to be described in this paper 

 probably belongs to the Bothriocephalidae. It may be called a 

 Plerocercoid and the name, Plerocercoides prolifer, is given simply 

 because it is desirable that there should be a distinctive name 

 for practical use. 



For the opportunities of studying this most interesting parasite 

 I am indebted to Dr. J. Kondô, Professor of Surgery in the 

 College of Medicine, Tokyo Imperial University, and also to his 

 assistants, Drs. H. Shioda, M. Yamamuea and K. Sugi. 



The patient who harbored, especially in the subcutaneous 

 tissues, enormous numbers of the worm in question, was a woman, 

 Yae Tanaka by name, and resident either in Tokyo or in its im- 

 mediate vicinity. Her occupation had been that of a weaver until she 

 was married to a dealer in old furniture, occupations which place 

 her decidedly in the lower class of society. In the spring of 1904, 

 she came to the University hospital for the treatment of an in- 



