S. O. Yoshida 
223 
strongly contracted specimens (fig. 1, J). It is not a permanent sucker 
or groove comparable with, those in other cestodes, but only an 
anterior invagination temporarily formed by the contraction of the head 
region. It is probable that this anterior invagination functions as a 
sucker. The contracted form of the posterior end is always different 
from that of the anterior end and the worm is unable to attach itself 
by this extremity. 
The internal structure. So far as my investigation goes, the internal 
structure of the parasite is essentially similar to that of the worms from 
Case I. I may, therefore, limit myself to the following remarks : 
The cuticula is very thin, generally not exceeding about 0-005 mm. 
in thickness. The fine dermal musculature lying under the cuticula 
consists of an outer layer of circular and an inner layer of longitudinal 
fibres. The nutritive particles, so termed by Prof. Ijima, vary in size 
and number; their shape is spherical, ovoid, or cylindrical. At first 
only a few of them were found in each specimen and this caused me to 
think for a time that the parasites possess fewer of them than do most 
cestodes. Subsequently, however, I found many specimens possessing 
an enormous number of them. It seems to me that the size, number, 
or position of the nutritive particles is irregular, but I have not yet 
arrived at any conclusion concerning the factors which determine these 
points. 
The calcareous bodies are not so abundant; they are spherical or 
ovoid in shape, measuring 0-01 mm. in length by 0‘005-0-007 mm. in 
breadth. They are equally distributed in all parts of the body, with 
the exception of the young buds in which only a few of them were found. 
The parenchymal musculature, the excretory canal, and other- 
structures are the same as those described by Ijima in Case I. 
We tried to transplant the worm into the subcutaneous tissues 
of a monkey for the purpose of determining if it is capable of pro¬ 
liferation in the tissues of other mammals. The experiment was tried 
by Dr Aoyama’s assistant, but the monkey died soon afterwards 
from some unknown cause, the result being negative. 
The third case in Japan. 
In 1911 a third case of infection with this cestode larva was 
observed in the Dermatological Institute, Imperial University of 
Kyoto. Unfortunately, I did not see the case, but by the kindness of 
Mr Inoue, I have examined worms removed from the patient and 
